Causes of Diarrhea

Acute Diarrhea: There are various causes of sudden-onset acute diarrhea, such as:

Toxic Causes of Diarrhea: Various drugs, medications, poisons, toxins, and substances can cause diarrhea:

Infectious Causes of Acute Diarrhea: Various different infections of the gastrointestinal system may cause diarrhea (usually with other symptoms such as fever):

Chronic Diarrhea Categories: There are various disorders that may cause chronic diarrhea, with the main classes of disorder being:

Note that many of the causes of Acute Diarrhea may also sometimes cause Chronic Diarrhea, such as where an infection is low-level (subacute) and/or lasts for some time.

Chronic Gastrointestinal Disorders: Various chronic disorders of the digestive tract may result in chronic diarrhea, such as:

Tumors and Chronic Diarrhea: Some tumors and cancers may cause chronic diarrhea, such as:

Endocrine Disorders: Various endocrine disorders may cause chronic diarrhea, such as:

Note that some tumors cause endocrine imbalance, as in the separate list of tumor causes of chronic diarrhea.

Other Chronic Diarrhea Causes: Various causes of chronic diarrhea include:

Causes of Bloody Diarrhea: Various disorders may cause bloody diarrhea (including many on the list for diarrhea in general):

Bloody diarrhea may also occasionally occur as a combination of a disorder causing blood in stool combined with, or resulting from, a different disorder causing diarrhea. For example, straining with diarrhea may cause a rectal bleed, such as from a burst hemorrhoid or anal fissure. Read more about: Rectal bleeding

Similar Symptoms: See also the various causes of similar and related symptoms, such as:

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Note: This site is for informational purposes only and is not medical advice. See your doctor or other qualified medical professional for all your medical needs.