Hemorrhoids consist of a network of vessels forming a plexus in the mucosa of the lower rectum and anus.
It is a painful linear slit (ulcer) of the anal canal that extends from the mucosa to the muscle fibers of the internal sphincter.
It is an abnormal track (a fine tube) that develops between the inner lining of the anus and the skin near the anus. It is the result of an untreated abscess.
It is a chronic inflammation of the skin at the level of the coccyx (tailbone).It is caused by loose hairs that penetrate the skin, enlargement of the hair follicles and colonization by bacteria.