Doctor insights on:
Why Do People Most Commonly Have Rectal Bleeding

1

Anatomy & physiology:
Lower part of rectum had communication between portal systems of GI tract that drains though liver & systemic system by normal venous return goes directly to heart , any increase of pressure in portal sys backs up , as in cirrhosis hemorriods etc and bleeds other reason to bleed, with each defecation due to streaching any ulcer like fissure, haemorroids , tumors, polyps infections all bleed.
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Rectal bleeding is a symptom in which a person has blood coming out of his anus, either during bowel movements (when he poops) and/or at other times. The bleeding can be from hemorrhoids, cancer, ulcers, etc.
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2

Rectal bleeding:
Rectal bleeding is often due to hemorrhoids. However, there are other causes that are very serious including cancer. In general, rectal bleeding should be discussed with your doctor and perhaps be consulted for a colonoscopy, especially if you are near the age of 50. http://www.laendo.net/english/gastrointestinal-bleeding.
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3

Depends:
If you are having persistent bleeding from your rectum, you need to get it checked. While hemorrhoids are a common cause of rectal bleeding, your physician may decide to pursue other diagnoses. Getting a full history and physical exam will guide the decision. Are you having symptoms like dizziness or passing out? Is the blood bright red or dark? These are questions that need to be answered.
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8

See your doctor.:
The most common cause of rectal bleeding in an 18 yo would be hemorrhoids but there can be other causes such as anal fissures or anal fistula. There are even rarer causes and sometimes the bleeding may be coming from other areas such as the colon or stomach. You should be evaluated by a surgeon.
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9

Not likely:
A particular food does not cause rectal bleeding. Hemorrhoids are the most common cause. Other causes are infections, inflammatory bowel diseases, ulcer or cancers. Rectal bleeding should not be ignored. It is important to see a physician and have it evaluated.
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Bleeding is a term describing the loss of blood. It can occur inside the body due to damage to blood vessels or organs or outside the body during menstruation or when there is a break in the skin.
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