The goal of this observational study is to describe the prevalence of typical and atypical signs and symptoms of Frey's syndrome, the affected areas and the severity of each symptom/sign. Participants will be asked will asked about * Presence or the absence of: a. gustatory sweating; b. gustatory flushing; c. gustatory itching; d. paresthesia; e. pain * Grade of severity: a. absence; b. mild; c. moderate; d. almost severe; e. severe * Affected area: a. preauricular; b. retroauricolar; c. temporal; d. retrangulomandibular; e. cheek