Hemorrhoids (AmE), haemorrhoids (BrE), emerods, or piles are swelling and inflammation of veins in the rectum and anus. The anatomical term "hemorrhoids" technically refers to "'Cushions of tissue filled with blood vessels at the junction of the rectum and the anus."[1] However, the term is popularly used to refer to varicosities of the hemorrhoid tissue.
http://en.wikipedia.org/wiki/Hemroids
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