This is a description of a dentally trained neurophysiologist's first-
hand experience of the slow and progressive deterioration of the pulp
of one of his posterior teeth. He describes his sensations throughout
the course of the pulpal pathosis and his experience as a patient unde
rgoing endodontic treatment for the first time. His subjective experie
nces are put into the context of the current understanding of the phys
iology of pain.