Frey syndrome (Lucie Frey, a Polish physician) is a condition in which gustatory sweating and flushing of skin occur. It follows trauma to skin overlying a salivary gland and is thought to be due to post-traumatic crossover of sympathetic and parasympathetic innervation to the gland and skin, respectively. Its frequency following superficial parotidectomy ranges from 0-100% depending on which surgeon you are talking to, but is almost certainly present in all cases to some degree if looked for carefully enough (use starch-iodine test).
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