Your Health Questions
Answered by Professionals

Hemoglobin is generally considered dangerously low when it falls below 7 g/dL in most adults, the threshold where blood transfusion is often considered, while levels under 5 g/dL are life-threatening and can lead to heart failure. For reference, normal ranges are roughly 13.8 to 17.2 g/dL for men, 12.1 to 15.1 g/dL for women, and slightly lower in pregnancy, so "dangerous" depends on your baseline, how quickly the drop happened, and whether you have heart or lung disease. Warning signs that demand urgent care include chest pain, severe shortness of breath, fainting, rapid heartbeat, and confusion. There are several important factors and exceptions to consider, including age, pregnancy, and cause of blood loss, so see below to understand more. If your numbers are low or you are feeling weak, dizzy, or unusually short of breath, the next step is knowing how urgent your situation really is. A free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you organize your symptoms, see possible causes of low hemoglobin, and understand whether you should book a routine visit or seek care right away. Last reviewed for medical accuracy: 09/23/2026

Normal blood oxygen saturation measured by pulse oximeter is typically 95% to 100%, while readings of 90% to 94% are considered borderline and below 90% signals hypoxemia that usually needs prompt medical attention. Seek emergency care if oxygen drops below 88% to 90%, or if you have bluish lips or fingertips, confusion, chest pain, or severe shortness of breath at rest. Several factors change how these numbers should be read, including chronic lung disease such as COPD (where a lower baseline may be expected), altitude, cold fingers, nail polish, poor circulation, and darker skin tone, which can cause pulse oximeters to overestimate true oxygen levels. Because the same reading can mean very different things depending on your symptoms and health history, see the details below before deciding whether to monitor at home or get urgent help. If your reading is borderline or you feel breathless and are unsure how serious it is, a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you interpret your numbers alongside your symptoms and history in just a few minutes, pointing you toward the right level of care and the questions worth raising with a clinician. Last reviewed for medical accuracy: 09/23/2026

Older adults most often report mild, short-lived COVID vaccine side effects such as soreness, redness or swelling at the injection site, fatigue, headache, low-grade fever, chills, muscle or joint aches, and swollen lymph nodes near the vaccinated arm, with reactions typically fading within one to three days. Notably, adults over 65 tend to experience fewer and milder systemic reactions than younger people, though age, medications, chronic conditions, and dose number can all change what you feel, and rare effects like allergic reactions or dizziness warrant prompt attention. There are several important factors to consider, including which symptoms signal a normal immune response versus something unrelated, so review the complete details below before deciding whether to wait it out or call your doctor. Because post-vaccine aches and fatigue can look a lot like early infection, dehydration, or a medication reaction, guessing can leave you treating the wrong problem. Take a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> to sort out what your symptoms may mean and get clear guidance on your next steps. Last reviewed for medical accuracy: 09/23/2026

Anti-Müllerian hormone (AMH) is produced by small follicles in the ovaries, so blood levels offer an estimate of how many eggs remain (ovarian reserve) rather than egg quality or your actual odds of conceiving naturally. Higher AMH often predicts a stronger response to IVF stimulation, while low AMH can signal diminished reserve or approaching menopause, and unusually high levels may point to PCOS. Still, AMH varies with age, hormonal birth control, smoking, and lab assay, and women with low AMH do conceive on their own, so results are best read alongside antral follicle count, FSH, and your cycle history. There are several important factors and exceptions to consider before drawing conclusions from a single number, so see below for the complete answer. If irregular cycles, trouble conceiving, or a surprising AMH result has you worried, a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you organize your symptoms, learn which conditions may be involved, and walk into your next appointment ready to ask the right questions. Last reviewed for medical accuracy: 09/23/2026

Elevated ESR and CRP together signal active inflammation somewhere in the body, and because both markers rise in response to infection, autoimmune disease, tissue injury, and certain cancers, they point to a problem without naming its cause. The pattern of the two results matters: CRP rises and falls quickly, so a high CRP with a high ESR often suggests a current, acute process, while a high ESR with a normalizing CRP can reflect a resolving or more chronic condition such as rheumatoid arthritis, lupus, giant cell arteritis, or polymyalgia rheumatica. Age, sex, anemia, obesity, pregnancy, kidney disease, and some medications can also shift these values, so results are only meaningful alongside your symptoms, exam, and other testing. There are several important factors and red flags to consider, including when further imaging or specialist referral is warranted, so see below to understand more. If you are trying to make sense of inflammatory markers and what to do next, a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you connect your specific symptoms to possible causes and decide how urgently to see a clinician. Last reviewed for medical accuracy: 09/23/2026

High homocysteine (hyperhomocysteinemia) means this amino acid is building up in your blood instead of being broken down, and at levels above roughly 15 micromol/L it is linked to damaged artery linings, stiffer vessels, easier clot formation, and a higher risk of heart attack, stroke, blood clots, and peripheral artery disease. Common drivers include low B12, B6, or folate, genetic variants such as MTHFR, kidney or thyroid disease, smoking, heavy alcohol use, and some medications, which is why treatment usually targets the underlying cause rather than the number alone. Importantly, homocysteine is considered a risk marker rather than a proven cause, and studies show that lowering it with B vitamins does not always reduce heart attacks, so your total cardiovascular picture matters far more than one lab value; see below for the details that determine whether your result is truly concerning. Because chest discomfort, shortness of breath, fatigue, numbness, or dizziness can signal either a vitamin issue or something more urgent involving your heart, it helps to get an objective read on your specific symptoms before deciding how quickly to act. Take a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> to see which conditions may explain what you are feeling and what your smartest next step should be. Last reviewed for medical accuracy: 09/23/2025

High T4 (thyroxine) levels usually mean your thyroid is producing more hormone than your body needs, a state called hyperthyroidism, which can speed up metabolism and cause weight loss, rapid heartbeat, tremors, anxiety, heat intolerance, and sleep trouble. Common causes include Graves' disease, thyroiditis, toxic nodules or goiter, too much thyroid hormone medication, and excess iodine, while pregnancy, estrogen, and certain illnesses can raise total T4 without true thyroid overactivity. Because free T4 and total T4 are interpreted differently and must be read alongside TSH and T3, an elevated result is not always a diagnosis on its own. There are several important factors and exceptions to consider, so see below to understand more about what your specific numbers and symptoms may indicate. If your labs came back high and you are trying to make sense of symptoms like a racing heart, unexplained weight changes, or persistent fatigue, a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you organize what you are experiencing, surface conditions that match your pattern, and clarify which questions and next steps to bring to a clinician before your next appointment. Last reviewed for medical accuracy: 09/23/2026

Blood protein levels measure albumin and globulin, the proteins that maintain fluid balance, transport nutrients, and support immune function, with a normal total protein range of roughly 6.0 to 8.3 g/dL (albumin about 3.5 to 5.0 g/dL and globulin about 2.0 to 3.5 g/dL). High total protein may point to dehydration, chronic inflammation, infection, or bone marrow disorders such as multiple myeloma, while low levels can suggest liver disease, kidney disease, malnutrition, or malabsorption conditions like celiac disease. Because reference ranges vary by lab, age, pregnancy, and medications, a single abnormal result rarely confirms a diagnosis on its own, and the albumin-to-globulin ratio often matters as much as the total number. There are several important factors to consider, including which symptoms accompany your results and when further testing is warranted, so review the complete answer below before drawing conclusions. If you are waiting on results or noticing signs like swelling, fatigue, unexplained weight loss, or frequent infections, a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you organize what you are experiencing, understand which conditions fit your pattern, and decide how soon to see a clinician. Last reviewed for medical accuracy: 09/23/2026

Troponin is a protein released into the blood when heart muscle is damaged, so a normal or low result usually means no significant injury, while an elevated or rising level can signal a heart attack or other strain on the heart. Interpretation depends on the specific assay used, your baseline level, and whether repeat tests hours apart show a rise or fall, since conditions like kidney disease, heart failure, infection, and intense exercise can also raise troponin without a blocked artery. There are several important factors to consider, including timing, symptoms, and follow-up testing, so see below to understand more before drawing conclusions from a single number. Because the same troponin value can mean very different things depending on your symptoms, history, and risk factors, it helps to organize what you are experiencing before your next conversation with a clinician. Take a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> to better understand what may be driving your results and what steps to take next. Last reviewed for medical accuracy: 09/23/2026

Long-term safety data from billions of administered doses show that serious side effects from COVID-19 vaccines are rare, typically appear within days to weeks of injection, and usually resolve, while no evidence has emerged of delayed harms surfacing months or years later. Rare events such as myocarditis (most often in younger males), Guillain-Barré syndrome, and blood clotting disorders tied to specific vaccine types remain closely monitored, and several factors including your age, sex, medical history, and which vaccine you received change what applies to you, so see below to understand more. If you are experiencing lingering symptoms like chest discomfort, fatigue, shortness of breath, headaches, or unusual heart rhythms, it can be difficult to tell whether a vaccine, a prior infection, or an unrelated condition is the cause. A free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you organize your symptoms, surface possible explanations, and see whether your situation warrants urgent care or a routine visit. Taking a few minutes now gives you clearer language for your doctor and a better sense of your next steps. Last reviewed for medical accuracy: 09/23/2026

A basophil count is part of a complete blood count with differential, and it measures the smallest group of white blood cells, the ones that release histamine and help drive allergic and inflammatory reactions. Normal results usually fall between 0 and 1 percent of total white blood cells, roughly 0 to 200 basophils per microliter, though reference ranges differ slightly by lab. Higher levels (basophilia) can suggest hypothyroidism, chronic inflammation, allergies, or less commonly a bone marrow disorder, while low levels may follow an acute allergic reaction, hyperthyroidism, infection, or steroid use. Because medications, recent illness, and your other blood values all change how a result should be read, there are several important factors to consider before drawing conclusions, and they are explained below. If your basophil result looks off and you are unsure whether it matters, a free, instant online <a href="https://ubiehealth.com/">symptom check</a> can help you connect your lab findings to what you are actually feeling, flag patterns worth discussing, and clarify whether you should see a doctor now or simply monitor. Last reviewed for medical accuracy: 09/23/2026

A BUN (blood urea nitrogen) test measures the amount of urea nitrogen in your blood, a waste product your liver creates when it breaks down protein and your kidneys filter out through urine. Normal BUN levels generally fall between 7 and 20 mg/dL for adults, though ranges shift with age, sex, pregnancy, hydration, and the lab performing the test. High BUN can point to kidney disease, dehydration, heart failure, high protein intake, or certain medications, while low BUN may signal liver disease, malnutrition, or overhydration. Because BUN is usually interpreted alongside creatinine and the BUN-to-creatinine ratio, a single number rarely tells the full story, and there are several important factors to consider before drawing conclusions. See below to understand more about what your results may mean. If your BUN result came back outside the normal range, or you are dealing with symptoms like fatigue, swelling, changes in urination, nausea, or confusion, it helps to get clarity fast rather than guessing. A free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you organize what you are experiencing, see which conditions may explain it, and understand whether you should book a visit, ask for follow-up labs, or seek urgent care. It takes just a few minutes, requires no insurance or sign-up, and gives you a clearer starting point for your next conversation with a clinician. Last reviewed for medical accuracy: 09/23/2026

A CBC with differential and platelet count measures three main parts of your blood: red blood cells (including hemoglobin and hematocrit) to screen for anemia or dehydration, white blood cells broken down by type (neutrophils, lymphocytes, monocytes, eosinophils, basophils) to help identify infection, inflammation, allergies, or blood disorders, and platelets to assess clotting ability and bleeding risk. Doctors order it as a broad screening tool, to investigate symptoms like fatigue, fever, bruising, or unexplained weight loss, and to monitor chronic conditions or medication side effects. Results are reported as counts, percentages, and red cell indices such as MCV, MCH, and RDW, each of which points toward different causes. There are several factors that affect what your numbers mean, including age, sex, pregnancy, altitude, recent illness, and medications, so see below to understand more. If you are waiting on results or trying to make sense of flagged values, the next step is connecting your numbers to what you are actually feeling. Abnormal counts rarely tell the whole story on their own, and the same result can mean something very different depending on your symptoms and history. A free, instant, online <a href="https://ubiehealth.com/">symptom check</a> takes just a few minutes, asks the kinds of questions a clinician would ask, and helps you see which possibilities fit your situation. That clarity makes your next conversation with a doctor far more productive, whether you need urgent care or simply a repeat test. Use it now so you can move forward with real direction instead of guesswork. Last reviewed for medical accuracy: 09/23/2026

A chloride blood test measures the level of chloride, an electrolyte that works with sodium, potassium, and bicarbonate to maintain fluid balance, blood volume, blood pressure, and acid-base (pH) status. Normal results for adults typically fall between about 96 and 106 mEq/L, though reference ranges vary by lab, age, and testing method, so your report's range matters most. High chloride (hyperchloremia) can point to dehydration, kidney disease, metabolic acidosis, or certain medications, while low chloride (hypochloremia) may follow prolonged vomiting, heart failure, lung disease, or diuretic use. Because chloride is usually interpreted alongside other electrolytes in a metabolic panel, a single abnormal number rarely tells the whole story, and several important factors are worth considering. See below to understand more about what may be influencing your results. If you are unsure why your chloride is high or low, or you have symptoms like fatigue, weakness, excessive thirst, muscle cramps, or breathing changes, the fastest way to get clarity is to organize your symptoms before your next appointment. A free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you see which conditions may explain what you are feeling, what questions to ask your clinician, and whether you should be evaluated urgently. It takes only a few minutes, requires no insurance or sign-up, and gives you a clearer starting point than guessing from a lab number alone. Last reviewed for medical accuracy: 09/24/2026

A high absolute eosinophil count, known as eosinophilia (generally above 500 cells per microliter), means your body is producing extra white blood cells that fight parasites and drive allergic reactions, most often due to allergies, asthma, eczema, drug reactions, parasitic infection, or less commonly autoimmune disease, certain cancers, or hypereosinophilic syndrome. The degree of elevation matters, since mild increases are often harmless while very high counts can signal organ involvement, so there are several important factors and patterns to consider below before drawing conclusions. Because a single number rarely tells the whole story, the details below explain how your symptoms, medications, travel history, and other labs change what the result likely means. If you are not sure whether your elevated eosinophils reflect a simple allergy or something that needs prompt evaluation, a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you connect your specific symptoms to possible causes in just a few minutes. That way, you walk into your next appointment with clearer questions, a better sense of urgency, and a practical idea of which type of doctor to see next. Last reviewed for medical accuracy: 09/23/2026

A high absolute monocyte count, called monocytosis, usually means more than about 800 to 1,000 monocytes per microliter of blood, and it often signals that your immune system is responding to chronic infection, inflammation, autoimmune disease, recovery from illness, or, less commonly, a blood or bone marrow disorder. Several factors influence what the result means for you, including how high the number is, your other white blood cell values, recent infections, medications, and any symptoms you have, so see below to understand more. Mildly elevated monocytes are common and frequently temporary, while persistently high levels paired with fatigue, fever, night sweats, unexplained weight loss, or easy bruising deserve prompt medical evaluation. Because the same lab value can point to something minor or something that needs follow-up testing, context matters more than the number alone. If you are trying to make sense of a high monocyte result, a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you connect your lab findings to how you actually feel, narrow down likely explanations, and clarify whether you should schedule testing now or simply monitor and recheck later. Last reviewed for medical accuracy: 09/23/2026

A high ALT (SGPT) level usually signals that liver cells are inflamed or damaged and are leaking this enzyme into the bloodstream, though the degree of elevation does not always match the severity of liver disease. Common causes include fatty liver disease, alcohol use, viral hepatitis, certain medications and supplements, and muscle injury or intense exercise, while mild elevations can sometimes be temporary and harmless. Doctors interpret ALT alongside AST, ALP, bilirubin, and your symptoms and history, because the pattern of results matters more than one number alone. There are several important factors and follow-up steps to consider, including when a repeat test or imaging is needed, so review the complete answer below before drawing conclusions. If you have an elevated ALT result or symptoms like fatigue, nausea, right-side abdominal discomfort, dark urine, or yellowing skin, a free, instant <a href="https://ubiehealth.com/">symptom check</a> can help you organize what you are experiencing, see which liver-related conditions may fit, and understand whether you should seek prompt medical care or simply schedule routine follow-up testing. Last reviewed for medical accuracy: 09/23/2026

A high BUN to creatinine ratio (generally above 20:1) often signals that your kidneys are receiving less blood flow than they need, most commonly from dehydration, blood loss, heart failure, or a high-protein diet, though gastrointestinal bleeding and certain medications like steroids or diuretics can also raise it. Because the ratio compares two waste products your kidneys filter, an elevated result usually points to a problem before the kidney (prerenal) rather than damage within the kidney itself, but the accompanying symptoms and lab values matter just as much as the number. Some causes resolve quickly with fluids, while others need prompt medical evaluation, so context is essential. There are several important factors to consider, including your other lab results, medications, and symptoms; see below to understand the complete picture. If you are trying to make sense of an abnormal lab value along with symptoms like fatigue, reduced urination, dizziness, or swelling, a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you organize what you are experiencing, see which conditions may explain it, and understand whether you should contact your doctor now or monitor at home. Last reviewed for medical accuracy: 09/23/2026

A high platelet count, called thrombocytosis, means your blood contains more than about 450,000 platelets per microliter, and it usually points to an underlying trigger rather than a disease of its own. Most cases are reactive (secondary) thrombocytosis, caused by infection, inflammation, iron deficiency anemia, recent surgery or blood loss, strenuous exercise, or removal of the spleen, and these typically resolve once the cause is treated. Less often it is essential (primary) thrombocythemia, a bone marrow disorder that can raise the risk of abnormal clotting or bleeding, sometimes alongside headaches, dizziness, numbness in the hands and feet, or an enlarged spleen. Because the number alone does not reveal the cause, doctors look at how high it is, how long it has lasted, and other blood results, so there are several important factors to consider before drawing conclusions, as explained below. If you have been told your platelets are high and you are unsure what it means for you, a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you connect your lab result to your symptoms, flag warning signs that deserve prompt attention, and clarify which questions and next steps to bring to your doctor. Last reviewed for medical accuracy: 09/23/2026

A high RDW (red cell distribution width) means your red blood cells vary more in size than normal, which often points to a nutritional deficiency such as low iron, vitamin B12, or folate, though liver disease, chronic conditions, recent blood loss, or bone marrow disorders can also cause it. Because RDW is interpreted alongside other results, especially MCV (average red cell size), the same elevated value can signal very different causes, and several important factors are explained below. Mildly high RDW with otherwise normal results may be harmless or an early sign of a developing anemia before other markers change. If you have fatigue, shortness of breath, pale skin, dizziness, or unexplained weakness with a high RDW, those details matter for figuring out next steps. Since lab numbers alone rarely tell the full story, a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you connect your results to what you are actually feeling and clarify whether you should see a doctor now or monitor and retest. Last reviewed for medical accuracy: 09/23/2026

A high RDW-CV means your red blood cells vary more in size than normal, a condition called anisocytosis, which often points to nutritional deficiencies in iron, vitamin B12, or folate, or to types of anemia, chronic liver or kidney disease, thyroid problems, recent blood loss, or bone marrow disorders. Because RDW-CV is rarely meaningful on its own, doctors read it alongside your hemoglobin, MCV, and other CBC values to narrow down the cause, and a mildly elevated result can even be temporary or harmless. There are several important factors to consider, including how high the value is and which other markers are abnormal, so see below to understand more before drawing conclusions. If you are trying to make sense of an elevated RDW-CV, the fastest way to know whether it warrants prompt attention is to look at the full picture: your symptoms, your history, and your other lab values together. Take a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> to see which conditions may explain your results, what questions to bring to your doctor, and what sensible next steps look like. Last reviewed for medical accuracy: 09/23/2026

A high relative eosinophil result means eosinophils make up a larger-than-normal percentage of your white blood cells, most often pointing to allergies, asthma, eczema, or a parasitic infection, though drug reactions, autoimmune conditions, adrenal insufficiency, and rarely blood disorders can also raise the level. Because the relative value is a percentage, it can look elevated even when your absolute eosinophil count is normal, which is why doctors compare it with your total white blood cell count before drawing conclusions. Mild elevations are common and often temporary, while persistently high counts warrant follow-up testing to rule out tissue or organ involvement. There are several important factors that influence what your specific number means, so see below to understand more. Since a single percentage cannot tell you whether your result reflects seasonal allergies, a reaction to a medication, or something that needs prompt attention, the fastest way to put your number in context is to look at it alongside your actual symptoms. A free, instant, online <a href="https://ubiehealth.com/">symptom check</a> takes just a few minutes, asks the same kinds of questions a clinician would, and helps you identify which possible causes fit your situation and how urgently you should follow up. That clarity means you walk into your next appointment with better questions and a clearer sense of your next steps. Last reviewed for medical accuracy: 09/23/2026

A high TSH usually signals that your thyroid is underactive (hypothyroidism), because the pituitary gland is releasing extra thyroid-stimulating hormone to push a sluggish thyroid into making more T4 and T3. Common causes include Hashimoto's thyroiditis, thyroid surgery or radiation, iodine imbalance, certain medications, and too low a dose of thyroid replacement therapy, though recent illness, pregnancy, and lab timing can also skew results. Mildly elevated TSH with normal T4 is called subclinical hypothyroidism and may not need treatment, while a very high TSH with low T4 typically does. Symptoms to watch for include fatigue, weight gain, cold intolerance, constipation, dry skin, hair thinning, brain fog, and heavy or irregular periods. Several important factors affect what your specific number means, including your age, pregnancy status, and repeat testing, so see the complete details below before drawing conclusions. Because a single TSH value rarely tells the whole story, it helps to look at your full symptom picture before your next appointment. A free, instant, online <a href="https://ubiehealth.com/">symptom check</a> lets you describe what you are experiencing in a few minutes, see which conditions may explain your results, and learn which tests or specialist to ask about, so you walk in prepared rather than guessing. Last reviewed for medical accuracy: 09/23/2025

A high white blood cell count in urine, called pyuria, usually signals inflammation or infection somewhere in the urinary tract, most often a bladder infection (UTI), but it can also point to kidney infection, kidney stones, sexually transmitted infections, prostate inflammation, pregnancy, certain medications, or non-infectious causes like interstitial cystitis. Because sterile pyuria (high WBCs without bacteria) and asymptomatic findings are handled very differently than a straightforward UTI, there are several important factors to consider, including your symptoms, other urinalysis results such as nitrites and blood, and whether a urine culture is needed; see below to understand more. Warning signs like fever, flank or back pain, vomiting, or blood in the urine suggest the infection may have reached the kidneys and need prompt medical attention. If you are unsure what your results mean or whether your symptoms warrant a visit, a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you organize what you are experiencing in just a few minutes. It uses your answers to highlight possible causes and suggest which type of care makes sense next, so you can walk into an appointment prepared instead of guessing. Last reviewed for medical accuracy: 09/23/2026

A high white blood cell count (leukocytosis, generally above 11,000 cells per microliter in adults) means your body is producing extra immune cells, most often in response to infection, inflammation, tissue injury, or physical and emotional stress. Common causes include bacterial or viral infections, smoking, allergies and asthma, autoimmune conditions like rheumatoid arthritis, medications such as corticosteroids, pregnancy, intense exercise, and less commonly blood disorders like leukemia or bone marrow disease. Which specific white cell type is elevated (neutrophils, lymphocytes, monocytes, eosinophils, or basophils) narrows the likely cause considerably, and mild elevations are frequently temporary and harmless. There are several important factors to consider, including accompanying symptoms and when to seek urgent care, so see below to understand more. Because a single lab value rarely tells the whole story, pairing your results with your actual symptoms is the fastest way to know whether this needs prompt attention or simply a repeat test. A free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you organize what you are experiencing, surface possible explanations for your elevated count, and clarify which questions to bring to your doctor next. Last reviewed for medical accuracy: 09/23/2026

A late period with a negative pregnancy test usually means you are not pregnant, but it can also mean you tested too early, before hCG levels were high enough to detect. Other common causes include stress, sudden weight changes, intense exercise, thyroid disorders, polycystic ovary syndrome (PCOS), perimenopause, certain medications, and hormonal birth control. Timing matters too, since irregular cycles, recent illness, or travel can delay ovulation and push your period back by days or weeks. There are several important factors to consider, including when to retest and which symptoms signal a need for medical care, so see below for the complete answer. If your period is late and you are unsure why, a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you sort through the possible causes in minutes, based on your own symptoms and cycle history, so you know whether to retest, wait, or talk with a clinician next. Last reviewed for medical accuracy: 09/23/2026

A lipase blood test measures the amount of lipase, an enzyme your pancreas makes to break down dietary fats, circulating in your bloodstream, with normal results generally falling around 0 to 160 units per liter (U/L) depending on the lab's reference range. Elevated lipase, often three times the upper limit or higher, commonly points to acute pancreatitis, while low or borderline results may reflect chronic pancreatic damage, cystic fibrosis, or other conditions, so there are several important factors to consider below. Because medications, kidney function, and even certain bowel or gallbladder problems can shift your numbers, the full explanation below outlines what your specific result may mean and which symptoms warrant prompt attention. If you have abdominal pain, nausea, oily stools, or unexplained weight loss alongside an abnormal lipase result, understanding the pattern of your symptoms is the fastest way to know how urgently you need care. Take a free, instant online <a href="https://ubiehealth.com/">symptom check</a> to see which possible causes match what you are experiencing and get clear guidance on your next steps. Last reviewed for medical accuracy: 09/23/2025

A low eGFR (estimated glomerular filtration rate) means your kidneys are filtering waste from your blood more slowly than normal, with results under 60 mL/min lasting three months or longer suggesting chronic kidney disease, and results under 15 indicating kidney failure. One low reading is not always permanent, because dehydration, certain medications, infection, uncontrolled diabetes or blood pressure, age, and muscle mass can all change the number, which is why repeat testing plus a urine albumin check are used before staging. There are several important factors to consider, including which eGFR ranges call for urgent attention and which symptoms, such as swelling, foamy urine, fatigue, or reduced urine output, should never be ignored; see below for the complete answer. Because a low eGFR can reflect anything from temporary dehydration to progressive kidney damage, understanding your own pattern of symptoms is a practical first step toward knowing how quickly you should be seen. Take a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> to better understand what may be driving your results and to get clear guidance on your next steps. Last reviewed for medical accuracy: 09/23/2026

Low ferritin means your body's iron stores are depleted, and it is often the earliest sign of iron deficiency, showing up before anemia appears on a standard blood count. Common causes include heavy menstrual periods, gastrointestinal blood loss, pregnancy, low dietary iron, and absorption problems such as celiac disease, with symptoms like fatigue, hair loss, brittle nails, headaches, dizziness, restless legs, and shortness of breath. Treatment typically focuses on correcting the underlying cause plus replenishing iron through iron-rich foods, oral iron supplements taken with vitamin C, or intravenous iron when supplements are not tolerated or absorption is poor. Several details matter here, including how low your number actually is, how long repletion takes, and when repeat testing is needed, so review the complete answer below before drawing conclusions. Because low ferritin can stem from anything as routine as diet or as serious as hidden internal bleeding, the smartest next step is to map your specific symptoms before you wait weeks for an appointment: take a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> to see which conditions fit your pattern, what questions to raise with your doctor, and how urgently you should be seen. Last reviewed for medical accuracy: 09/23/2026

A low MCV (mean corpuscular volume) means your red blood cells are smaller than average, a condition called microcytosis that most often points to iron deficiency anemia, thalassemia, chronic inflammation, or lead exposure. Because MCV is only one part of a complete blood count, the result must be interpreted alongside hemoglobin, ferritin, and red cell distribution width to reveal the true cause. Symptoms such as fatigue, pale skin, shortness of breath, cold hands, or unusual cravings for ice may accompany small red blood cells, though mild cases often cause no symptoms at all. There are several important factors and possible causes to consider, including inherited conditions that need very different treatment than nutritional deficiencies, so see below to understand more. If you have been told your MCV is low and you are unsure whether it explains how you have been feeling, a free, instant, online <a href="https://ubiehealth.com/">symptom check</a> can help you connect your lab result to your actual symptoms, narrow down likely causes, and decide how urgently to follow up with a clinician. Last reviewed for medical accuracy: 09/23/2026