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What causes abdominal pain, diarrhea and loss of appetite? 19 possible conditions

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


Viral Gastroenteritis

Viral gastroenteritis, also known as the stomach flu, is caused by a number of different viruses. Its symptoms usually last for two to three days.

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Giardiasis is an infection in your small intestine. It's caused by a microscopic parasite. Giardiasis spreads through contact with infected people.

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PMS (Premenstrual Syndrome)

PMS symptoms start five to 11 days before menstruation and typically go away once menstruation begins. The cause of PMS is unknown.

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The Many Sides of Bacterial Gastroenteritis

Bacterial infections are common causes of gastrointestinal infections. This type of infection is also called "food poisoning" and is often caused by poor hygiene or ingesting foods contaminated with bacteria.

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Irritable Bowel Syndrome

Irritable bowel syndrome (IBS) is a chronic condition that affects the large intestine and causes many uncomfortable symptoms, such as bloating, gas, cramping, diarrhea, constipation, and pain.

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

Appendicitis is inflammation of the appendix, which can be fatal if left untreated. The telltale sign is pain that usually starts as mild cramping, especially on the right side, and becomes more severe over time.

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Celiac Disease (Gluten Intolerance)

Celiac disease is a digestive disorder caused by an immune reaction to gluten. Symptoms vary but can include arthritis, fatigue, and abdominal symptoms.

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Ulcerative Colitis

Ulcerative colitis is an inflammatory bowel disease. It occurs when the lining of the large intestine (colon or bowel) and the rectum become inflamed.

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Crohn’s Disease

Crohn's disease is a chronic bowel disease that causes severe inflammation of the digestive tract. It is associated with abdominal pain, diarrhea, and may affect your quality of life. Crohn's disease is characterized b...

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E. coli Infection

E. coli is a type of bacteria normally found in intestines. But certain kinds of E. coli can cause infection and severe symptoms like diarrhea and dehydration.

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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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Addison’s Disease

Addison's disease occurs when the adrenal cortex is damaged and the adrenal glands don't produce enough of the steroid hormones cortisol and aldosterone.

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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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Pancreatic Cancer

Pancreatic cancer is cancer of the pancreas, an organ that secretes an enzyme that breaks down fats, carbs, and proteins. Pancreatic cancer can obstruct the outflow of bile from the liver and causes yellow skin.

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West Nile Virus Infection (West Nile Fever)

Spread by mosquitos, West Nile virus symptoms can vary in severity. Diarrhea and abdominal pain usually appears within two weeks of infection.

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Leishmaniasis is a parasitic disease caused by the Leishmania parasite found in sand flies.

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Acetaminophen Overdose

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

Acetaminophen is a pain reliever found in over-the-counter medications such as Tylenol and in prescription medications. Overuse of this ingredient can lead to liver damage, and an overdose can be fatal.

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Encopresis is also known as fecal soiling. It occurs when a child over the age of 4 years has a bowel movement and soils his or her pants. This behavior is often linked to constipation. Constipation occurs when stoo...

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Hypersensitivity (Allergic) Vasculitis

Vasculitis is inflammation of blood vessels. It can damage blood vessels by thickening, scarring, and weakening the cell wells. There are many different types of vasculitis; some are acute and last a short time, whil...

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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.