This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
How do you manage an established freys syndrome? 
Select and explain. 
A. Facial nerve stimulation, B. Physiotherapy, C. Antidepressants, D. Tympanic neurectomy
D: Tympanic neurectomy
Answer: D: Tympanic neurectomy 
Explanation: MANAGEMENT OF ESTABLISHED FREY'S SYNDROMEAntiperspirants, usually containing aluminium chloride;Denervation by tympanic neurectomy;The injection of botulinum toxin into the affected skin.PreventionTechniques described to prevent Frey's syndrome following parotidectomy. These include:Sternomastoid muscle flap;Temporalis fascial flap;Inseion of aificial membranes between the skin and the parotid bed.Ref: Bailey and love, page no: 795