Diarrhea | Symptom Checker
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What causes diarrhea? 87 possible conditions

See a list of possible causes in order from the most common to the least.

41

The War of Cells: Graft vs. Host Disease

Graft vs. Host Disease (GvHD) is a reaction that develops after a bone marrow transplant when the donor and the recipient are different people.

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42

Legionnaires' Disease

Legionnaires' disease is a severe type of pneumonia, or lung infection. Learn about its symptoms, causes, treatment, and prevention.

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43

Hookworm Infections

Hookworms are parasites that affect the small intestine and lungs. The first sign of infection is usually a rash where the parasite entered the skin, followed by diarrhea.

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44

Absence of Gamma Globulin in Blood

Agammaglobulinemia is an inherited immune system disorder in which the body is unable to produce antibodies.

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45

Acetaminophen Overdose

This condition is considered a medical emergency. Urgent care may be required.

Acetaminophen (Tylenol) is a pain reliever found in over-the-counter and prescription medications. Overdose can cause liver damage.

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46

All About Abetalipoproteinemia

Abetalipoproteinemia (ABL) is an inherited condition that prevents the body from completely absorbing certain dietary fats.

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47

Whipple's Disease

Bacteria cause Whipple's disease. This disease can make it difficult for your body to absorb nutrients. Learn about its symptoms.

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48

Anthrax

This condition is considered a medical emergency. Urgent care may be required.

Anthrax is a serious illness caused by a microbe called Bacillus anthracis that lives in soil. Read about the symptoms of anthrax.

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49

Bird Flu

Bird flu, also called avian influenza, is a viral infection that can also infect humans and other animals.

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50

Ebola Virus and Disease

This condition is considered a medical emergency. Urgent care may be required.

Ebola disease is a rare, often fatal illness. One of its late-stage symptoms is a bleeding rash over the entire body.

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51

Peripheral Neuropathy

Your peripheral nervous system connects the nerves from the brain and spinal cord (central nervous system) to the rest of the body, including the arms, hands, feet, legs, internal organs, mouth and face. The job o...

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52

Drug Allergy Overview

This condition is considered a medical emergency. Urgent care may be required.

A drug allergy is an allergic reaction to a medication. Your immune system identifies the drug as foreign and acts to eliminate it from your body.

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53

Systemic Sclerosis (Scleroderma)

Scleroderma is an autoimmune disorder that is characterized by changes in the texture and appearance of the skin due to an increase in collagen. It can affect blood vessels and muscles, and a number of vital organs.

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54

Intestinal Obstruction

If your small or large intestine becomes blocked, fluid and digested food cannot move through. This can cause bloating, stomach cramps, and burping.

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55

Megaloblastic Anemia

Megaloblastic anemia is a blood disorder marked by the appearance of very large red blood cells that crowd out healthy cells, causing anemia.

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56

Fifth Disease

Fifth disease is common in children. It causes a red rash on the arms, legs, and cheeks, and a virus called parvovirus B19 causes it.

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57

Pernicious Anemia

Pernicious anemia occurs when your body can't absorb enough vitamin B-12 to function properly. Learn about the signs and symptoms of pernicious anemia.

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58

SARS (Severe Acute Respiratory Syndrome)

This condition is considered a medical emergency. Urgent care may be required.

Severe acute respiratory syndrome (SARS) is a particularly serious form of viral pneumonia. In addition to fever, dry cough, breathing problems, and several other symptoms, one symptom of SARS is a rash.

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59

Pancreatic Cancer

Pancreatic cancer is one of the most deadly forms of cancer and is often difficult to detect. Learn more about symptoms and treatments.

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60

Autism Overview

Autism is one of a group of neurodevelopmental disorders, which are characterized by impaired communication and social interaction, and restricted, repetitive and stereotyped patterns of behaviors or interests.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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