To the Editor.—
In "Recurrent Severe Facial Perspiration and Redness" (239:2701, 1978), I believe the answer given to the question was incorrect.This patient has gustatory sweating, also called Frey's syndrome. The patient perspires profusely in the region innervated by the auriculotemporal nerve. Usually, no treatment is needed unless symptoms are severe. If symptoms are severe, it may then help to resect the tympanic plexus in the middle ear, since it is through this pathway that parasympathetic motor fibers from the petrosal ganglion reach the otic ganglion and finally the auriculotemporal branch of the mandibular nerve.