A case of proctalgia fugax.

The syndrome called proctalgia fugax may be a repository of various conditions, because there are no distinctive signs or supporting tests. Usually, the pain of this condition is described as cramping, gnawing or tight, and lasts about ten to 15 minutes. It occurs most frequently at night and is localized to the rectal region above the anus. One subgroup may be diagnosed by the existence of a `shelf sign' in the rectum. This shelf is probably caused by pubococcygeus spasm. Patients suffering from proctalgia fugax tend to be perfectionists and above average in intelligence. A literature review and the case history of one patient illustrate the difficulties, frustrations and pitfalls associated with this incurable condition.