Inclusion Criteria:  age of 19 to 69 diagnosed with unilateral peripheral facial nerve palsy onset of facial palsy within 3 weeks or less. an individual who can provide written consent form to participate in the study.  Exclusion Criteria:  diagnosed with central nervous system disease causing facial palsy secondary facial palsy after multiple sclerosis, tumor, cerebrovascular disease and temporal bone fracture. Ramsay-Hunt syndrome bilateral or recurrent facial nerve palsy. an individual who received any treatment that can have a significant effect on changes in facial paralysis within recent 2 month. (ie. facial nerve decompression surgery) already or planned to be pregnant or breast-feeding within the study period. uncontrolled diabetes mellitus within the last 3 months. within a month after participating any other facial palsy-related clinical trials, or planning to participate other clinical trials within 6 month. impossible to read and understand the documents, regarding informed consent form and the questionnaires. difficult to participate according to the judgement of researchers.