Blood in vomit or stool can be a sign of gastrointestinal (GI) bleeding. GI bleeding can be scary, though the cause of the bleeding may not be serious. You should ALWAYS see a doctor if GI bleeding occurs.
The GI tract is the path through which food travels in the body. Food passes from the mouth down the esophagus (the tube from the mouth to the stomach). Food begins to break down in the stomach. It then moves through the duodenum, the first part of the small intestine. Nutrients are absorbed as food travels through the small intestine. What is left passes into the colon (large intestine) as waste. The colon removes water from the waste. Waste continues from the colon to the rectum (where stool is stored). Waste then leaves the body through the anus.
GI bleeding can be caused by many different problems. Some of the more common causes include:
Ulcer (sore on the lining of the GI tract)
Cuts or scrapes in the mouth or throat
Infection (bacteria or parasites)
Inflammation (swelling or irritation of the lining of the GI tract)
Polyps (growths of tissue)
Abnormal pouches in part of the GI tract
Tears in the anus
If blood is coming out in your stool, it may signal a lower GI tract problem. Bleeding from the GI tract can be bright red, or it may look dark and tarry. Occult blood can’t be seen with the eye, but can be found in the stool on tests. To determine the cause, tests that may be ordered include:
Hemoccult test: checks a stool sample for blood
Stool culture: checks a stool sample for bacteria or parasites
X-ray, ultrasound, or CT scan: imaging tests that take pictures of the digestive tract
Colonoscopy or sigmoidoscopy: a test during which a flexible tube with a camera is inserted through the anus into the rectum to view the inside of your colon. This lets the doctor do a biopsy (take a tiny tissue sample).
Vomiting blood may signal an upper GI tract problem. To determine the cause, tests that may be ordered include:
Upper Endoscopy: a test during which a flexible tube with a camera is inserted through the mouth and throat to see inside the upper GI tract. This lets the doctor do a biopsy (take a tiny tissue sample).
X-ray, ultrasound, or CT scan: tests that take pictures of the digestive tract
Upper GI series: X-rays of the upper part of the GI tract taken from inside the body
Bleeding from the mouth or anus that can’t be stopped
Fever of 100.4°F (38.0°) or higher
Bleeding accompanied by lightheadedness or dizziness
Signs of dehydration (dry, sticky mouth; decreased urine output; very dark urine)
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