<prompt> Freys syndrome gustatory sweating is due to lesion ofGlossopharyngeal nerveChorda tympani nerveTrigeminal nerveAuriculo-temporal nerve  <response>: Auriculotemporal nerve carries parasympathetic secreto-motor fibres to parotid gland. After parotidectomy, sometimes there may be regeneration of secretomotor fibres in Auriculotemporal N This regeneration is misdirected into sweat glands. Thus, whenever the patient thinks of foodsmells chews food there would be stimulation of sweat glands hyperaemia resulting in redness sweating in front of ear on cheek. This clinical entity is called FREY SYNDROMEAURICULOTEMPORAL SYNDROMEGUSTATORY SWEATING. Image showing Starch-iodine test: 