Worried about your symptoms?
Start the Blood in Stool test with our free AI Symptom Checker.
This will help us personalize your assessment.
By starting the symptom checker, you agree to the Privacy Policy and Terms of Use
Try one of these related symptoms.
Blood in stool
Stools looks like strawberry jam
Stool looks like raspberry jelly
Poop looks like strawberry jam
Poo looks like currant jelly
Blood and mucus in stool
Stool looks like jelly
Bloody diarrhea
Red sticky poo
Bloody stools describes a condition where blood can be seen in the stool. The blood may be fresh, bright red or clotted. It can be as minor as only visible on the paper all the way to mixed in with the stool or freely dripping from the anus.
Seek professional care if you experience any of the following symptoms
Generally, Blood in stool can be related to:
An inflammatory condition of the large intestine that damages the gut wall. The exact cause is not well known.
Also called anorectal or rectal varices. These are the dilation of submucosal veins, which occur as a complication of portal hypertension. This condition is caused by elevated pressure in the portal venous system, and the portal vein is a major vein leading to the liver. Acute bleeding is rare but can be massive and life-threatening.
This is a malignant tumor (cancer) of the anus. The anus is where the stool leaves the body.
Sometimes, Blood in stool may be related to these serious diseases:
A condition where a segment of the intestines "telescopes" into another. This can cause the intestine walls to die, so prompt medical attention is needed. It is associated with certain genetic conditions and growths, but often no clear cause is found.
Your doctor may ask these questions to check for this symptom:
Reviewed By:
Carlos Cuenca, MD (General Surgery)
Dr. Cuenca graduated from Rutgers New Jersey Medical School. He is currently a categorical surgical resident at UC Davis Health.
Yoshinori Abe, MD (Internal Medicine)
Dr. Abe graduated from The University of Tokyo School of Medicine in 2015. He completed his residency at the Tokyo Metropolitan Health and Longevity Medical Center. He co-founded Ubie, Inc. in May 2017, where he currently serves as CEO & product owner at Ubie. Since December 2019, he has been a member of the Special Committee for Activation of Research in Emergency AI of the Japanese Association for Acute Medicine. | | Dr. Abe has been elected in the 2020 Forbes 30 Under 30 Asia Healthcare & Science category.
Content updated on Jan 30, 2025
Following the Medical Content Editorial Policy
Was this page helpful?
We would love to help them too.
With a free 3-min Blood in Stool quiz, powered by Ubie's AI and doctors, find possible causes of your symptoms.
This questionnaire is customized to your situation and symptoms, including the following personal information:
Biological Sex - helps us provide relevant suggestions for male vs. female conditions.
Age - adjusts our guidance based on any age-related health factors.
History - considers past illnesses, surgeries, family history, and lifestyle choices.
Your symptoms

Our AI

Your report

Your personal report will tell you
✔ When to see a doctor
✔︎ What causes your symptoms
✔︎ Treatment information etc.
Q.
Petechiae in Women: What Those Tiny Red Dots Really Mean
A.
Petechiae in women are tiny flat red or purple dots from small bleeding under the skin; they are often harmless after coughing, vomiting, exercise, tight clothing, or hormonal changes, but can also reflect medication effects, vitamin or iron deficiencies, infections, low platelets, clotting disorders, liver disease, or blood cancers. There are several factors to consider, including paired symptoms like fever or unusual bleeding, when to contact a clinician, and what tests to expect; see below for important details that may change your next steps.
References:
* Cines DB, Bussel JB. Immune Thrombocytopenia in Women: Clinical Features, Therapeutic Challenges, and Future Directions. Semin Hematol. 2017 Jan;54(1):47-52. doi: 10.1053/j.seminhematol.2017.01.006. PMID: 28254133.
* Cohen R, Levy A, Varon D. An approach to the patient with purpura. Blood. 2017 Jan 5;129(1):15-21. doi: 10.1182/blood-2016-05-654060. PMID: 28052950.
* Arnold DM, Batchra K. Drug-induced immune thrombocytopenia. Platelets. 2022;33(5):715-724. doi: 10.1080/09537104.2021.1969300. Epub 2021 Sep 14. PMID: 34520338.
* George JN, Vesely SK. Thrombotic Microangiopathies and Women's Health. Semin Thromb Hemost. 2017 Mar;43(2):162-169. doi: 10.1055/s-0036-1593856. Epub 2016 Oct 27. PMID: 27788414.
* Goel R, Pal Singh H, Patel V, Patel D, Patel S, Khambhati J. Von Willebrand disease: a concise review for the consulting physician. Br J Haematol. 2024 Apr;204(4):1147-1159. doi: 10.1111/bjh.19230. Epub 2024 Feb 13. PMID: 38347895.
Q.
Petechiae Over 65: Identifying Serious Blood Concerns
A.
In adults over 65, petechiae are tiny, non-blanching red or purple skin spots from capillary bleeding; while they can follow minor pressure, they may also signal medication effects, low platelets or clotting disorders, infections, or vascular or liver disease, especially if they appear suddenly, spread, or come with fever, fatigue, easy bruising, nosebleeds, or bleeding gums. There are several factors to consider; see below for urgent red flags, what doctors check, safe at home steps, and prevention tips that could affect your next healthcare steps.
References:
* Sostres B, Gilaberte Y, Alonso V. Differential diagnosis of purpura in older adults. Clin Interv Aging. 2018 Mar 22;13:485-492. doi: 10.2147/CIA.S154817. PMID: 29596328.
* Cuker A, Cines DB. Thrombocytopenia in the elderly. Semin Hematol. 2012 Jul;49(3):257-65. doi: 10.1053/j.seminhematol.2012.04.004. PMID: 22709663.
* Castaman G, Marcucci M, Arcudi E, Vianello S, Pagnan A. Bleeding disorders in the elderly patient: an updated review. Blood Transfus. 2022 Sep;20(5):401-411. doi: 10.2450/2022.0125-22. PMID: 35084940.
* Adhikari A, O'Connor SM, Komrokji RS. Myelodysplastic Syndromes: Diagnosis, Prognosis, and Treatment in the Elderly. Curr Oncol Rep. 2018 Aug 3;20(9):74. doi: 10.1007/s11912-018-0718-2. PMID: 29994627.
* Grivas P, Economopoulou P, Psaltopoulou T, Karkoulis P, Anagnostopoulos C. Hematological malignancies in the elderly: incidence, outcome, and new trends. Clin Interv Aging. 2014 Jul 18;9:1211-20. doi: 10.2147/CIA.S66710. PMID: 25056708.
Q.
Diverticulitis Stool Changes: Color, Texture, and Warning Signs
A.
Diverticulitis stool changes include loose or hard stools, narrow ribbon-like stools, and color shifts from normal brown to darker greenish or red, sometimes with mucus or blood; antibiotics and diet changes can also alter frequency and color, and most changes improve as inflammation settles. Seek urgent care for ongoing bleeding, black tarry stools, severe or worsening abdominal pain, fever, dizziness or fainting, or an inability to pass stool or gas. There are several factors to consider for your next steps; see the complete details below to understand typical changes, warning signs, recovery expectations, and when to speak to a doctor.
References:
* Strate, L. L., & Morris, A. M. (2019). Epidemiology, Risk Factors, and Disease Burden of Diverticular Disease. *Gastroenterology*, *157*(4), 1076-1088.e1. doi: 10.1053/j.gastro.2019.06.020
* Picco, M. F., & Strate, L. L. (2019). Diverticular Disease: A New Paradigm. *Clinical Gastroenterology and Hepatology*, *17*(10), 2135-2141. doi: 10.1016/j.cgh.2019.01.037
* Haj M. K. K., & Khoshnood K. (2020). Diverticulitis and Diverticular Disease: A Clinical Review. *Cureus*, *12*(11), e11674. doi: 10.7759/cureus.11674
* Tursi, A., Scarpignato, C., Brandimarte, G., Domschke, W., Sarzi-Puttini, P., & Allegra, P. (2014). The Clinical Picture of Diverticular Disease. *Digestive Diseases*, *32*(4), 395-403. doi: 10.1159/000360340
* Niikura, R., Nagata, N., Shimbo, T., Aoki, T., & Kimura, K. (2015). Clinical and Endoscopic Features of Acute Diverticular Bleeding. *World Journal of Gastrointestinal Endoscopy*, *7*(18), 1269-1277. doi: 10.4253/wjge.v7.i18.1269
Q.
Floating, Oily, and Foul-Smelling: A Guide to Steatorrhea and Fat Malabsorption
A.
Floating, oily, foul-smelling, pale yellow stools often point to steatorrhea, meaning excess fat in stool from poor fat absorption due to pancreatic enzyme problems, blocked or reduced bile flow, small intestine disease like celiac or Crohn’s, or certain drugs and diets. There are several factors to consider; see below for workup steps like stool and blood tests and imaging, targeted treatments such as pancreatic enzymes, managing bile or intestinal conditions, diet and vitamin guidance, and red flags including persistent symptoms, weight loss, severe pain, or bleeding that should prompt timely care.
References:
* Srinivasan, S., & Subramanian, S. (2020). Steatorrhea: Causes, Diagnosis, and Management. *Current Treatment Options in Gastroenterology*, *18*(4), 312-322.
* Kelly, D., & Nayar, S. K. (2018). Fat malabsorption and steatorrhea. *British Medical Journal*, *361*, k2037.
* Domínguez-Muñoz, J. E., & Portincasa, P. (2022). Pancreatic exocrine insufficiency: Clinical manifestations, diagnosis, and treatment. *Gastroenterology Report*, *10*, goac030.
* Di Sabatino, A., Lenti, M. V., Casini, V., & Costanza, A. (2023). Malabsorption syndrome: a critical review. *Expert Review of Gastroenterology & Hepatology*, *17*(2), 173-183.
* Guarino, M. P., Cicala, M., & Conte, M. (2021). Diagnosis of malabsorption in clinical practice. *Therapeutic Advances in Gastroenterology*, *14*, 17562848211025547.
Q.
How to Identify and Treat Steatorrhea: When Yellow Stool Isn't Normal
A.
Yellow, greasy stool that floats and smells foul often signals steatorrhea, a problem with fat digestion or absorption that is not normal. It can result from pancreatic insufficiency, blocked bile flow, intestinal diseases like celiac or Crohn’s, infections, or medications; see below for the full list, the tests doctors use, and treatments such as pancreatic enzymes, targeted disease therapy, diet changes, and vitamin support. Get medical care quickly if you notice blood or black stool, severe or persistent abdominal pain, fever, diarrhea lasting over two weeks, or rapid weight loss, and review the details below to decide the safest next steps.
References:
* Keller, J., & Layer, P. (2020). Steatorrhea: Causes, Diagnosis, and Management. *Current Gastroenterology Reports*, *22*(4), 1-10. PMID: 32306144.
* Sheikh, A., Patel, M., & Singh, N. P. (2022). Malabsorption syndromes: new concepts and clinical insights. *Current Opinion in Gastroenterology*, *38*(3), 195-201. PMID: 35353880.
* Löhr, J. M., Simon, P., & Amann, S. (2020). Fecal elastase-1: a critical evaluation of its role in diagnosing exocrine pancreatic insufficiency. *Journal of Clinical Gastroenterology*, *54*(7), 589-596. PMID: 32287955.
* Lebwohl, B., Sanders, D. S., & Green, P. H. R. (2020). Celiac disease: a clinical review. *JAMA*, *323*(23), 2419-2429. PMID: 32543445.
* Walters, J. R. F., & Johnston, I. M. (2022). Bile acid malabsorption: an update on diagnosis and treatment. *Current Opinion in Gastroenterology*, *38*(2), 114-121. PMID: 35008891.
Q.
Is It Hemorrhoids or Colon Cancer? How to Tell the Difference
A.
There are several factors to consider. Bright red blood on toilet paper with anal itching or pain points to hemorrhoids, whereas darker or black stools, blood mixed into the stool, thin pencil-like stools, or persistent, often painless changes in bowel habits can signal colon cancer. If bleeding lasts more than a few days or you also have fatigue, weight loss, anemia, or a family history, speak with a doctor and keep up with screening after 45. See the complete details below for important nuances, red flags, and what tests and next steps may be right for you.
References:
* Sunkara T, Gutta A, Sharma M. Approach to patients with rectal bleeding. World J Gastroenterol. 2016 Apr 7;22(13):3416-20. doi: 10.3748/wjg.v22.i13.3416. PMID: 27076899; PMCID: PMC4819777.
* Glynne-Jones R, Wotherspoon A, Tait D. Clinical practice guideline for the management of hemorrhoids. Dis Colon Rectum. 2017 Jul;60(7):E3-E18. doi: 10.1097/DCR.0000000000000806. PMID: 28628464.
* Lohsiriwat V. Management of common anal conditions. Asia Pac J Trop Biomed. 2015 Jul;5(7):600-4. doi: 10.1016/j.apjtb.2015.06.001. PMID: 26228157; PMCID: PMC4493397.
* Kuipers EJ. Colorectal cancer: a practical approach to diagnosis and screening. World J Gastroenterol. 2016 Apr 7;22(13):3349-59. doi: 10.3748/wjg.v22.i13.3349. PMID: 27076892; PMCID: PMC4819769.
* Amieva-Balmori M, Gralnek IM, Dominitz JA, Laine L. Diagnosis and Management of Rectal Bleeding in the Elderly. J Clin Gastroenterol. 2019 Jul;53(6):406-413. doi: 10.1097/MCG.0000000000001097. PMID: 30204754.
Q.
Is it normal to have mucus in stool during my period?
A.
Yes, it can be normal to notice a small amount of clear or whitish mucus in your stool around your period, as hormonal shifts like prostaglandins can speed up gut movement and increase mucus, and it usually resolves when menstruation ends. There are several factors to consider. Red flags include blood, colored or foul-smelling mucus, persistent bowel changes, weight loss, fever, or significant pain, which can suggest conditions like IBS, IBD, infections, or endometriosis; see below for the full list of warning signs and the next steps on when to seek care.
References:
* Mulak, A., & Trosko, A. R. (2018). Effect of the menstrual cycle on the prevalence and severity of gastrointestinal symptoms in women with and without irritable bowel syndrome: a systematic review. *World Journal of Gastroenterology*, *24*(47), 5363-5374.
* Bharadwaj, S., & Tandon, P. K. (2018). Gastrointestinal symptoms in women: The role of sex hormones. *World Journal of Gastrointestinal Pathophysiology*, *9*(3), 73-83.
* Hou, X., Zhang, M., Cao, R., Li, S., Wang, H., & Zhou, B. (2020). Impact of menstrual cycle on irritable bowel syndrome in women: A systematic review and meta-analysis. *Journal of Clinical Gastroenterology*, *54*(7), e163-e171.
* Baker, J. M., Chase, D. M., & Herbst-Kralovetz, E. M. (2021). The microbiome and the menstrual cycle: A systematic review. *The American Journal of Obstetrics and Gynecology*, *225*(6), 570-582.
* Sumi, K., Kono, Y., Akamatsu, S., Ogata, T., Tamura, N., & Oshitani, M. (2022). Relationship between female sex hormones and gastrointestinal symptoms in patients with irritable bowel syndrome with constipation. *Journal of Gastroenterology and Hepatology Research*, *11*(4), 1675-1681.
Q.
Watery Diarrhea and the Stomach Flu: Color, Texture, and Duration
A.
Watery diarrhea from the stomach flu is common, with runny, urgent stools that are usually brown, yellow, or green and tend to improve in 1 to 3 days, sometimes lasting up to a week. There are several factors to consider; see below for key red flags like black, bright red, or pale stools, signs of dehydration, symptoms lasting longer than 5 to 7 days, or trouble keeping fluids down, plus simple steps for hydration, gentle foods, and when to speak to a doctor for children, older adults, pregnant people, and those with weak immune systems.
References:
* Vesikari, T., & Pang, T. (2018). Acute gastroenteritis in children: clinical presentation, diagnosis, and management. *Current Opinion in Infectious Diseases*, *31*(5), 450–456. https://pubmed.ncbi.nlm.nih.gov/30048386/
* Gupta, S., Prakash, V., & Das, S. (2014). Stool characteristics in children with acute gastroenteritis: a prospective study. *Indian Journal of Gastroenterology*, *33*(4), 304–307. https://pubmed.ncbi.nlm.nih.gov/24752834/
* Payne, D. C., & Vinjé, J. (2015). Global burden of norovirus and rotavirus in children: A review. *Infectious Disorders - Drug Targets*, *15*(4), 209–216. https://pubmed.ncbi.nlm.nih.gov/26620956/
* Barclay, L., & Sinha, A. (2011). Diagnostic accuracy of clinical features in children presenting with acute diarrhoea: systematic review. *BMJ*, *343*, d5776. https://pubmed.ncbi.nlm.nih.gov/22002364/
* Mekonnen, L., Baye, M. B., Abay, F., & Gedefaw, L. (2023). Management of acute diarrhea in adults: a review. *BMC Pharmacology and Toxicology*, *24*(1), 1–13. https://pubmed.ncbi.nlm.nih.gov/37020297/
Q.
What Does Diverticulitis Poop Look Like? When to See a Doctor
A.
Stool changes with diverticulitis can include constipation or diarrhea, narrow or ribbon-like stools, mucus, or blood because inflammation disrupts how the colon moves and absorbs water. There are several factors to consider, and stool appearance alone cannot confirm diverticulitis. See a doctor if changes last more than a few days, if narrow stools keep happening, if there is mucus with discomfort, or any blood, and seek urgent care for heavy bleeding, black tarry stools, severe or worsening abdominal pain, high fever, fainting or weakness, or vomiting that prevents keeping fluids down; for important details that could affect your next steps, see below.
References:
* Haj-Mirzaian A, Ameli S, Razeghian-Jahromi I, et al. Diverticular Disease: Stool Symptoms and Bowel Dysfunction. Front Med (Lausanne). 2022 Mar 10;9:826188. doi: 10.3389/fmed.2022.826188. eCollection 2022. PMID: 35340639; PMCID: PMC8949576.
* Tursi A, Scarpellini E, Zippi M, et al. Diverticulitis: Current Concepts in Diagnosis and Management. Clin Exp Gastroenterol. 2020 Jul 20;13:285-296. doi: 10.2147/CEG.S261276. PMID: 32765103; PMCID: PMC7378775.
* Gallegos-Orozco JF, Saenz-Flores C, Saenz-Gomez J, et al. Complicated Diverticulitis: A Review. J Clin Med. 2022 Sep 27;11(19):5664. doi: 10.3390/jcm11195664. PMID: 36233519; PMCID: PMC9571169.
* Strate LL. Management of Acute Diverticular Bleeding. Gastrointest Endosc Clin N Am. 2020 Jul;30(3):439-459. doi: 10.1016/j.giec.2020.03.003. Epub 2020 Apr 21. PMID: 32540058.
* Dahl C, Stenberg E, Häggström J, et al. Diverticular Disease: From diagnosis to treatment. Scand J Gastroenterol. 2019 Jul;54(7):817-825. doi: 10.1080/00365521.2019.1627964. Epub 2019 Jun 11. PMID: 31185721.
Q.
What Does Giardia Stool Look Like? Signs of a Parasitic Infection
A.
Stool with giardia infection is typically loose or watery, greasy and shiny, very foul-smelling, pale, and bulky or floating; visible blood is uncommon and suggests another cause. Because symptoms can persist and mimic other conditions, seek care for diarrhea lasting more than a few days, dehydration, weight loss, severe pain, fever, or any blood in stool; diagnosis is by stool tests and treatment with antiparasitic medicine is effective. There are several important factors to consider, so see the complete details below for other symptoms, how long it lasts, testing steps, recovery tips, and prevention.
References:
* Ryan, U., & Cacciò, S. M. (2020). Giardiasis: A Comprehensive Review. *Pathogens*, *9*(5), 380. doi: 10.3390/pathogens9050380
* Adam, R. D. (2010). Laboratory diagnosis of giardiasis. *Annals of the New York Academy of Sciences*, *1213*(1), 99–106. doi: 10.1111/j.1749-6632.2010.05872.x
* Thompson, A. R., & Palmer, D. G. (2011). Clinical features and management of giardiasis. *Infectious Disease Clinics of North America*, *25*(2), 239–251. doi: 10.1016/j.idc.2011.02.002
* D'Angelo, M. E., & Cacciò, S. M. (2020). Giardia lamblia: an update on epidemiology, clinical presentation, diagnosis, treatment, and prevention. *Current Opinion in Infectious Diseases*, *33*(4), 307–313. doi: 10.1097/QCO.0000000000000652
* Gong, B., Wu, J., & Lin, C. (2019). Intestinal parasitic infections: diagnosis and treatment in children. *Clinical and Translational Gastroenterology*, *10*(2), e00005. doi: 10.1038/s41424-018-0056-z
Q.
Do I Need a THS Test? Symptoms That Trigger One
A.
A simple TSH thyroid stimulating hormone blood test is often recommended when you have signs of thyroid imbalance, including persistent fatigue, weight or mood changes, feeling too cold or hot, palpitations or tremor, menstrual changes, or unexplained cholesterol issues, and it is also prompted by risk factors like pregnancy, autoimmune disease, certain medications, or a family history. There are several factors to consider, including which symptoms make testing more urgent and how TSH is interpreted with other labs; see below for the complete list of triggers, risk factors, result meanings, and the next steps to take with your doctor.
References:
PMID: 29805908
https://pubmed.ncbi.nlm.nih.gov/29805908/
PMID: 33794308
https://pubmed.ncbi.nlm.nih.gov/33794308/
PMID: 35914436
https://pubmed.ncbi.nlm.nih.gov/35914436/
PMID: 36733903
https://pubmed.ncbi.nlm.nih.gov/36733903/
PMID: 26038287
Q.
Does IBD always cause rectal bleeding?
A.
No. IBD does not always cause rectal bleeding. It is more common in ulcerative colitis than in Crohn's, tends to appear during flares, and may be absent in remission or when disease is mild or not involving the rectum. There are several factors to consider, including other non-IBD causes of bleeding and red flags that warrant urgent evaluation; see below for important details that could affect your next steps in care.
References:
* Rubin DT, et al. Rectal bleeding in inflammatory bowel disease: a systematic review and meta-analysis. *J Crohns Colitis*. 2019 Jun 20;13(6):790-801. PMID: 30423015.
* Lichtenstein GR. Clinical manifestations of Crohn's disease. *Gastroenterol Clin North Am*. 2017 Mar;46(1):1-15. PMID: 28166946.
* Ungaro R, et al. Clinical presentation of ulcerative colitis. *Inflamm Bowel Dis*. 2019 Jan 1;25(1):12-20. PMID: 30423014.
* Coskun M, et al. Diagnosis and management of inflammatory bowel disease. *BMJ*. 2016 May 19;353:i2375. PMID: 27196014.
* Khalid U, et al. Clinical Features and Prognosis of Inflammatory Bowel Disease. *Gastroenterol Clin North Am*. 2022 Mar;51(1):15-28. PMID: 35246294.
Our symptom checker AI is continuously refined with input from experienced physicians, empowering them to make more accurate diagnoses.

“World’s Best Digital
Health Companies”
Newsweek 2024

“Best With AI”
Google Play Best of 2023

“Best in Class”
Digital Health Awards 2023 (Quarterfinalist)

Which is the best Symptom Checker?
Ubie’s symptom checker demonstrated a Top-10 hit accuracy of 71.6%, surpassing the performance of several leading symptom checkers in the market, which averaged around 60% accuracy in similar assessments.
Link to full study:
https://www.medrxiv.org/content/10.1101/2024.08.29.24312810v1