Perianal abscesses due to ingested foreign bodies.

Four cases of perianal abscesses due to foreign bodies (FBs) impacted in the anal canal are reported. The clinical presentation mimics common causes of acute anal pain. Digital rectal examination under local or general anaesthesia and/or proctoscopy can establish the diagnosis, but may miss the presence of an FB. Incision and drainage of the abscess along with removal of the FB results in immediate pain relief and long-term cure. Impacted FBs must not be overlooked as an unusual cause of perianal abscess.