Periodic migrainous neuralgia: a cause of dental pain.

The clinical findings in thirty-five cases of periodic migrainous neuralgia (PMN) are given. Typical case histories are used to illustrate the fact that the condition may mimic dental pain. The nomenclature and association of the condition with migraine are briefly discussed, and a plea is made that the condition always be considered in cases of facial pain, when other clinical features of the disease are present, in order to save needless loss of teeth and delay in treatment.