‘Nerve pain’ in the ANUS or RECTUM, without any local disease to account for it. Proctalgia fugax is a condition more common in men, characterised by cramp-like pains in the rectum and occasionally accompanied by a feeling of faintness. Occurring at night and lasting up to 15 minutes, the cause is unknown, but is probably due to muscle spasm. Rapid relief may be achieved by taking food or drink, exerting perineal pressure (including inserting a finger into the rectum), or sucking a 1 mg tablet of GLYCERYL TRINITRATE.