A hemorrhoid is a bulging, distended vein in the area around the anus, the opening through which stool passes. This happens when pressure in the abdomen increases, causing blood to back up inside blood vessels, making them bulge and stretch out of shape.
In most cases, the increase in abdominal pressure that triggers hemorrhoids is related to one or more of the following:
Repeated straining to have a bowel movement, especially in people who suffer from frequent constipation
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Source: HealthCentral Encyclopedia
Hemorrhoids (also known as "piles") are dilated or bulging veins of the rectum and anus, caused by increased pressure in the rectal veins. Fifty to... Read more »
Source: ADAM Encyclopedia
Hemorrhoids are painful, swollen veins in the lower portion of the rectum or anus.Alternative NamesRectal lump; Piles; Lump in the rectum Causes,... Read more »
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Source: ADAM Encyclopedia
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