Anesthesia dolorosa or anaesthesia dolorosa is pain felt in an area (usually of the face) which is completely numb to touch.

Anesthesia dolorosa or anaesthesia dolorosa is pain felt in an area (usually of the face) which is completely numb to touch.

Mesencephalotomy is the damaging of the junction of the trigeminal tract and the periaqueductal gray in the brain, and has produced pain relief in a group of patients with cancer pain; but when applied to six anesthesia dolorosa patients, no pain relief was achieved, and the unpleasant sensation was in fact increased.