Frey's syndrome is the most common adverse event after parotidectomy, and usually, it appears after 6 months. In our case, symptoms appear 20 years from surgery, an uncommon condition. Intralesional botulinum toxin gives excellent results in therapy, regardless of the time elapsed between surgery and the first treatment.
Keywords: Frey syndrome; Mikulicz syndrome; Minor test; Sjogren syndrome; botulinum toxin; parotidectomy.