Diarrhea: Causes, Symptoms and Diagnosis
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What causes diarrhea? 87 possible conditions

Diarrhea occurs when you have loose, watery stools or a frequent need to have a bowel movement.  Read more

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

1

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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2

Food Poisoning

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

Food poisoning occurs when you consume foods contaminated with bacteria, viruses, or parasites. Symptoms are usually uncomfortable but not severe.

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3

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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4

Giardiasis

Giardiasis is an infection in your small intestine caused by microscopic parasites called giardia.

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5

Food Allergy Basics

Food allergies are overblown responses by the immune system to foods that aren't typically harmful - like eggs and peanuts. Continue reading and learn more about food allergies, and how to prevent or treat sever...

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6

Lactose Intolerance

Lactose intolerance is the inability to break down lactose, a natural sugar. Learn about signs and treatment.

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7

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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8

Celiac Disease (Gluten Intolerance)

Celiac disease is a digestive disorder caused by an abnormal immune reaction to gluten. Learn about celiac disease systems, diagnosis, and treatment.

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9

Malabsorption Syndrome

Malabsorption syndrome occurs when the intestine's ability to absorb important nutrients is compromised. Certain conditions, such as Celiac disease, cystic fibrosis, and dairy allergies may lead to malabsorption.

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10

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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11

Colonic (Colorectal) Polyps

Colonic polyps are growths that appear on the surface of the colon. Learn about colonic polyp symptoms, causes, treatment, and prevention.

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12

Fecal Impaction of the Colon

Fecal impaction of the colon is when stool becomes stuck in the colon and is unable to leave the body.

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13

Colorectal (Colon) Cancer

Colorectal cancer is a cancer that starts in the rectum or colon, located in the lower portion of the digestive system.

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14

Amebiasis

Amebiasis is a parasitic infection of the intestines commonly contracted in tropical regions.

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15

Necrotizing Enterocolitis

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

Necrotizing enterocolitis occurs when the intestinal tissue becomes damaged and dies. Learn about its symptoms, causes, and how it's diagnosed.

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16

Salmonella Food Poisoning (Salmonella Enterocolitis)

Salmonella food poisoning is one of the most common types of food poisoning. The Salmonella bacteria live in the intestines of humans and animals.

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17

Diverticulitis

Diverticula are bulging sacs that can appear in the lining of your large intestine. Diverticulitis occurs when these sacs get acutely infected or inflamed.

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18

Diabetic Neuropathy

Diabetic neuropathy is a common complication of types 1 and 2 diabetes due to uncontrolled high blood sugar levels that result in damage to the nerves. According to the American Diabetes Association (ADA), between 6...

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19

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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20

Shigellosis

Shigellosis is a bacterial infection that affects the digestive system. The Shigella bacterium is spread through contact with contaminated feces.

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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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