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. Read more about the symptoms of this infection and treatment options.

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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

Peripheral neuropathy is a disorder that occurs when your peripheral nerves malfunction because they're damaged.

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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)

Systemic sclerosis (SS) is an autoimmune disorder in which the body's immune system attacks the body.

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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 serious form of viral pneumonia. The virus that causes SARS was first identified in 2003.

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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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