BAsic information description An abscess (collection of pus due to infection) that develops in the area around the anus and rectum. They may occur on the edge of the anal opening or deep in the rectum. They are more common in men, and are also common in people with digestion problems. frequent signs and symptoms Swelling around the rectum. Redness around the rectum. Dull or throbbing pain around the rectum. Difficulty or pain with bowel movement. Unable to sit comfortably. ...