Health Care Encyclopedia
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Hemorrhoids The most common causes of hemorrhoids are straining at bowel movements, prolonged sitting and pregnancy. Internal hemorrhoids occur above the anal sphincter, and external hemorrhoids occur below, outside the anal canal.
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| Review Date: 8/12/2004 12:00:00 AM
Reviewed By: J. Gordon Lambert, MD, Associate Medical Director; G. Eric Morgan, MS3; RxRemedy and A.D.A.M. Medical Illustration Team.
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