Your Health Questions
Answered by Professionals

Early effects can be subtle—nausea, vomiting, loss of appetite, sweating/pallor, and mild abdominal discomfort—then 24–96 hours later may progress to right‑upper‑abdominal pain, markedly abnormal liver tests, jaundice, easy bruising/bleeding, low blood sugar, confusion/encephalopathy, and potentially acute liver failure. Other serious complications include acute kidney injury (reduced urine), pancreatitis, metabolic acidosis, low blood pressure, respiratory distress, and even multi‑organ failure; there are time‑sensitive steps (e.g., antidote timing with N‑acetylcysteine, lab monitoring, ER evaluation) and risk factors that affect outcomes, so see the complete details below and seek urgent medical care if an overdose is possible.

You generally can’t make a stye disappear overnight, but you can quickly reduce pain and swelling with frequent warm compresses (10–15 minutes, 3–5 times/day), gentle lid hygiene, stopping makeup/contacts, and, when appropriate, an antibiotic ointment or prescription azithromycin 1% eye drops—never squeeze it. Most clear in 7–10 days; seek care sooner for worsening redness/swelling, vision changes, or fever. There are several factors and options (including when to use oral antibiotics or drainage) that could change your next steps—see the complete guidance below.

Lower left abdominal pain in women can stem from the GI tract (diverticulitis, IBS/IBD, constipation, colitis or obstruction), gynecologic causes (ovarian cysts or torsion, ectopic pregnancy, endometriosis, PID, ovulation pain), urinary issues (UTI, kidney stones, pyelonephritis), or musculoskeletal/hernia and vascular problems. There are several factors to consider—and some are emergencies, especially sudden severe pain, fever, vomiting, abnormal vaginal bleeding, or symptoms in early pregnancy—so see the complete details below to recognize red flags and choose the right next steps.

Sudden left arm pain can arise from heart problems (heart attack or angina, rarely aortic dissection), but also from muscle/tendon strain or rotator cuff issues, pinched nerves in the neck, and less commonly lung/vascular conditions, reflux, or shingles. Get emergency care if it comes with chest pressure, shortness of breath, sweating, fainting, or pain spreading to the jaw or back; activity-linked, tender, or tingling pain may point to musculoskeletal or nerve causes. There are several factors to consider—see below for important details and next steps that could affect what you do next.

Low alkaline phosphatase can result from genetic hypophosphatasia; nutrient deficiencies (zinc, magnesium, protein); endocrine issues (hypothyroidism, poorly controlled diabetes); hematologic disorders (vitamin B12 deficiency, aplastic anemia); malabsorption (celiac/IBD); liver/metabolic disease (Wilson disease, severe fatty liver); severe illness or cachexia; medications/toxins (chemotherapy, corticosteroids, heavy metals); and even lab handling or assay errors. Mild reductions can be benign, but very low levels—especially with bone pain, fractures, jaundice, or persistent fatigue—warrant medical follow‑up; there are several factors to consider, and important testing and next steps are detailed below.

In women, pain under the right armpit can stem from muscle strain; swollen lymph nodes or skin infections (including abscesses or shingles); breast issues like mastitis or, less commonly, cancer; nerve problems; referred pain from the gallbladder or liver; or even a vein clot. There are several factors to consider—see below for specifics, urgent warning signs (severe chest pain or breathing trouble, fever with redness, arm swelling/discoloration, rapidly growing lumps with night sweats/weight loss), and next steps including self-care for mild strain versus seeing a clinician if symptoms persist beyond 1–2 weeks or worsen.

Low alkaline phosphatase means your level is below the lab’s reference range and is most often tied to nutrition or absorption issues (low protein, zinc, magnesium, B12), hypothyroidism, chronic liver disease, or rarer conditions like hypophosphatasia or Wilson’s disease; most cases are mild and reversible. There are several factors to consider—see below for detailed causes, red-flag symptoms (bone pain or fractures, jaundice, neurologic changes), and clear next steps such as repeating the test, checking related labs, reviewing diet/medications, and when to see a clinician.

Fast relief typically comes from rest and supported positioning, cold for the first 24–48 hours then heat, over-the-counter pain relievers (ibuprofen/naproxen or acetaminophen), topical gels, gentle stretching or self‑massage, a TENS unit, and quick ergonomic adjustments. There are several factors and warning signs that could change your next steps—especially chest pain or shortness of breath, sudden severe pain, numbness/weakness, or fever/redness—so review the complete guidance below to know when to continue self-care versus seek urgent care.

Quick at-home relief includes warm compresses, gentle eyelid massage, frequent blinking with lubricating drops, brief cold packs, cutting back caffeine, managing stress, taking screen breaks, and getting more sleep; some women also find magnesium (200–400 mg/day, with your doctor’s okay) helpful. There are several factors to consider— including hydration and nutrition to prevent recurrences and red-flag symptoms (lasting >2 weeks, spreading to the face, pain/redness/discharge, or vision changes) that warrant medical care—see the complete guidance below.

Watch for mild issues like upset stomach, headache, dizziness, or a light rash, but seek urgent care for hives, facial/lip/tongue swelling, trouble breathing, or any signs of liver injury/overdose such as persistent vomiting, severe upper-right belly pain, jaundice (yellow eyes/skin), dark urine, confusion, unusual sleepiness, or easy bruising/bleeding. If you suspect too much was taken, call Poison Control (1-800-222-1222) or go to the ER—there are several factors (weight-based dosing, hidden acetaminophen in combo cold/flu meds, liver disease, dehydration, drug interactions) that can raise risk; see the complete guidance below to understand what to do next.

Left arm pain is more likely from a nerve when it’s burning, shooting, electric, or “pins and needles,” follows a clear path from the neck/shoulder into the hand, and includes numbness or specific weakness—often aggravated by neck, wrist, or elbow positions. There are several factors to consider, including important look‑alikes (heart pain, muscle/joint issues) and red flags like sudden crushing chest pain or rapidly worsening weakness; see the complete guidance below for key signs, simple self-checks, and when to seek urgent care versus try conservative treatment.

Usually benign, but left eyelid twitching in women is more concerning if it lasts longer than two weeks, spreads to other facial muscles or forces the eye closed, follows head/eye injury, or occurs with neurological or systemic symptoms (facial weakness, vision or speech changes, numbness, fever, unexplained weight loss). These can point to blepharospasm/hemifacial spasm, thyroid eye disease, electrolyte issues, or neurological disorders (including stroke)—there are several factors to consider; see the complete details and recommended next steps below.

Lower left abdominal pain in women is serious when it’s sudden or severe, or accompanied by fever, persistent vomiting, fainting/shock, vaginal bleeding or possible pregnancy, inability to pass stool/gas with distension, or blood in stool/vomit—potential emergencies include ectopic pregnancy, ovarian torsion, diverticulitis complications, kidney stones/infection, bowel obstruction, or a ruptured ovarian cyst. Seek emergency care for these red flags; otherwise, call your clinician if symptoms last more than 48 hours or worsen. There are several factors to consider—see below for detailed causes, nuanced red flags, and the exact tests and next steps that could change your care.

The most important acetaminophen side effects that impact the liver are elevated liver enzymes (an early sign of injury), hepatic necrosis, and acute liver failure—often accompanied by jaundice, coagulopathy (easy bruising/bleeding), and hepatic encephalopathy (confusion). There are several factors to consider that can change your risk and next steps (dose limits, alcohol use, malnutrition, interacting medicines, early symptoms, and the role of N-acetylcysteine); see the complete guidance below.

Red-flag Tylenol side effects that may signal liver trouble include jaundice (yellow skin/eyes), dark urine, pale stools, right‑upper abdominal pain, persistent nausea/vomiting, extreme fatigue/weakness, loss of appetite, or confusion. If you notice any of these—especially jaundice, dark urine, or severe abdominal pain—stop Tylenol and seek urgent care; there are several important risk factors, safe‑dose limits, and next steps to consider—see details below.

There are several factors to consider. Even when not pregnant, post‑workout nipple pain is usually from friction/chafing, sweat/salt irritation, contact dermatitis, yeast/bacterial overgrowth, chest‑muscle strain, or normal hormone sensitivity—and it often improves with a well‑fitting moisture‑wicking sports bra, protective balm, and prompt drying. See below for step‑by‑step prevention and the red flags (new lump, discharge, spreading redness/fever, or skin changes) that determine when to seek medical care.

There are several factors to consider: even when not pregnant, nipple tenderness is usually benign and can result from cyclical hormone shifts (including perimenopause), stress-related cortisol changes and chest wall tension, friction from clothing or ill‑fitting bras, skin conditions or infections, medication effects, referred chest wall pain, and—less commonly—Paget’s disease or breast cancer. Try a supportive bra, stress reduction, warm/cold compresses or OTC pain relief, and track triggers; seek prompt care for persistent one‑sided pain, discharge (especially bloody/clear), nonhealing rash/ulceration, a lump, fever, or sudden severe pain—complete details and next steps are outlined below.

Most nipple pain during your cycle when you’re not pregnant is usually from normal hormonal swings (cyclical mastalgia) that increase breast sensitivity, but fibrocystic changes, skin irritation, friction, infection, or rarer issues can also contribute. Simple steps like a supportive bra, warm compresses, OTC pain relievers, and cutting back on caffeine/salt/alcohol often help, but seek care for one-sided or persistent pain, discharge, skin changes, a hard lump, or infection signs. There are several factors to consider and important next steps that may apply to you—see below for details.

Skin irritation is a leading cause—often from contact dermatitis (soaps/detergents, fabrics), eczema/psoriasis, chafing, or allergies—but hormones, infections (bacterial/yeast/herpes), injury, and rare conditions like Paget’s disease or inflammatory breast cancer can also contribute. Try gentle, fragrance-free products, a supportive bra, cool compresses, and short-term hydrocortisone for dermatitis, and seek care urgently for persistent/worsening pain, discharge (especially bloody), new lumps, spreading redness/fever, or nipple/skin changes. There are several factors to consider; key details and next steps that could affect your care are outlined below.

There are several factors to consider: sudden right‑side armpit pain is often from muscle strain, swollen lymph nodes, or skin issues, but can also arise from shingles or nerve irritation, or be referred from deeper conditions like gallbladder disease, liver/diaphragm irritation, atypical heart symptoms, or (rarely) a lung apex tumor. Seek urgent care for severe or unexplained pain, fever/redness or pus, a hard or rapidly enlarging lump, chest tightness/shortness of breath or sweating, jaundice, or new arm weakness/numbness. See below for key details that can guide your next steps, including what to watch for, home care, prevention, and when to call a doctor.

There are several factors to consider—“long COVID” generally means new or ongoing symptoms (often fatigue, breathlessness, or brain fog) that last beyond 4–12 weeks after a COVID-19 infection and may flare with physical or mental effort. To know if this applies to you, check the timing, pattern, and impact on daily life, and have a clinician rule out other causes with basic labs and heart/lung evaluations (seek urgent care for severe chest pain, sudden shortness of breath, fainting, or signs of a blood clot). See below for a complete checklist, specific tests, self-care and rehab strategies, and red flags that can guide your next steps.

Cats can catch SARS‑CoV‑2 (usually from their owners) and most have mild or no symptoms; importantly, there are no confirmed cases of cats transmitting COVID to people, and CDC/WHO consider the risk low. There are several factors and precautions to consider if someone in your home is sick—see below for details on reducing risk, what symptoms in cats to watch for, and when to contact a vet or doctor.

Yes—an underactive thyroid (hypothyroidism) can lower alkaline phosphatase by slowing bone turnover, and levels often normalize after thyroid hormone treatment. There are several other potential causes (nutritional deficiencies, malabsorption, rare genetic disorders), so persistent low results merit repeat testing and checks like TSH/free T4 and nutrient levels—see the important details and next‑step guidance below.

Yes—workouts can trigger pain under the right armpit in females, most often from muscle strain (pectoralis/serratus/latissimus), pectoralis minor syndrome, or improper form and overuse. There are several factors to consider: other causes include swollen lymph nodes, breast or skin conditions, intercostal or cervical nerve issues, and thoracic outlet problems, with red flags like a hard lump, fever, numbness, or sudden severe pain needing prompt care. See below for how to tell if it’s workout-related, prevention steps, and guidance on when to see a clinician.

Yes—swollen axillary lymph nodes can cause pain under the right armpit in women, often tender and worse with arm movement, and most commonly linked to infections, recent vaccinations, or minor injuries. Seek prompt care if a lump is hard, fixed, rapidly enlarging, >2 cm, or accompanied by fever, night sweats, weight loss, or breast changes; imaging like ultrasound and mammography may be used. There are several factors to consider; see below for other possible causes, home assessment tips, supportive care, and when in-person evaluation or biopsy may be needed.

Current evidence shows COVID-19 vaccines do not cause infertility in men or women—large studies (including IVF), global pregnancy registries, and major medical organizations (ACOG, ASRM, WHO) all support their safety for fertility and pregnancy. If you’re trying to conceive or undergoing treatment, there’s no need to delay vaccination; infection itself poses more risk to reproductive health—there are several factors to consider, so see the details below for how this may affect your next steps and when to contact a clinician.

New COVID strains mainly differ in how easily they spread, how well they dodge parts of our immune defenses, and (to a lesser extent) how severe illness may be. Vaccines and boosters still provide strong protection against severe disease, so aim for informed vigilance rather than alarm, especially by updating shots and using layered precautions in higher-risk settings. There are several factors to consider—like your personal risks, local spread, and when to test or seek care—so see below for important details that could shape your next steps.

For sudden testicle pain when torsion is a concern, treat it as an emergency—go to the ER now; while you head there or wait, elevate/support the scrotum, apply a cold pack 10–15 minutes at a time, rest on your back with knees bent, and consider ibuprofen as directed if safe (avoid warm baths until torsion is ruled out). Red flags include sudden severe one‑sided pain, rapid swelling/redness, a high‑riding testicle, and nausea/vomiting—torsion needs treatment within about 6 hours to prevent permanent damage. There are several factors to consider; see below for step‑by‑step pain relief, what not to do, and the exact urgent steps and evaluation to expect.

Left arm pain can be a heart attack warning—especially if it comes with chest pressure, shortness of breath, sweating, nausea/lightheadedness, or pain spreading to the jaw, back, or right arm; in those cases, call emergency services immediately. On its own, left arm pain is often from muscle, joint, or nerve issues, but there are several factors to consider; see below for how to tell heart-related symptoms from more common causes and the exact next steps. If the pain is sudden or severe, or you have heart risk factors, seek prompt medical care even without chest pain.

Yes—tonsillitis in adults is contagious: viral infections typically spread from a day before symptoms through about 5–7 days (longer with mono), while strep (bacterial) remains contagious until 24 hours after starting the right antibiotic and can last much longer without treatment. It’s generally safe to return to work when you’re fever-free for 24 hours and symptoms are improving; for confirmed strep, wait at least 24 hours after the first antibiotic dose. There are several factors to consider (testing, symptom severity, workplace precautions)—see below for important details that could change your next steps.