Gastrointestinal bleeding, Weight loss: 19 Possible Causes
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What causes gastrointestinal bleeding and weight loss? 19 possible conditions

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


Peptic Ulcer

Peptic ulcers are painful sores in the lining of the stomach, esophagus, or small intestine. Peptic ulcers are a fairly common health problem.

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Cirrhosis is the severe scarring and poor function of the liver caused by long-term exposure to toxins such as alcohol or viral infections.

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Stomach Ulcer

Stomach ulcers are painful sores in the stomach lining or small intestine. They occur when the mucus that protects the stomach from digestive juices is reduced.

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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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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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Esophageal Cancer

Esophageal cancer occurs when a malignant (cancerous) tumor forms in the lining of the esophagus, which is the muscular tube responsible for moving food from the throat to the stomach. As the cancer grows, it can affec...

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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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Stomach Cancer (Gastric Adenocarcinoma)

Stomach cancer occurs when cancerous cells form in the stomach lining. Because it's difficult to detect, it's often not diagnosed until it's more advanced.

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Liver Cancer

Learn about liver cancer symptoms, types, diagnosis, treatment, and prevention.

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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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Anal Cancer

Anal cancer is a rare form of cancer that affects the tissues of the anus. Read more on what causes it and how to diagnose it.

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Lactose Intolerance

Lactose intolerance is the inability to break down a type of natural sugar called lactose. Lactose is commonly found in dairy products, such as milk and yogurt. A person becomes lactose intolerant when his or her smal...

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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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Colitis is inflammation of the colon. Read about the different types and associated symptoms.

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

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Medullary Cystic Disease

Medullary cystic kidney disease (MCKD) is a rare condition in which small, fluid-filled sacs called cysts form in the center of the kidneys. These cysts scar the kidneys and cause them to malfunction. In order t...

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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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Glomerulonephritis is a serious illness that can be life-threatening and requires immediate treatment. The condition is sometimes called nephritis.

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Carcinoid Syndrome

Carcinoid syndrome occurs when a carcinoid tumor puts dangerous chemicals back into your bloodstream.

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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.