A small tear in the lining of the anus. Anal fissure may occur when passing hard or large stools. An anal fissure can cause pain and bleeding during bowel movements. Fissures can cause bleeding piles and fistulas.
Straining or passing a particularly hard stool can damage the surface of a hemorrhoid, causing it to bleed. Blood from a hemorrhoid will look bright red on a piece of toilet paper. Internal, external, and thrombosed hemorrhoids can all bleed. In some cases, a thrombosed hemorrhoid can burst if it becomes too full.
Frequent anal abscesses. Pain and swelling around the anus. Bloody or foul-smelling drainage (pus) from an opening around the anus. ... Irritation of the skin around the anus from drainage. Pain with bowel movements. Bleeding. Fever, chills and a general feeling of fatigue.
