If the patient has peripheral facial palsy, the facial nerve is damaged at a higher site, and the best time for treatment is delayed due to untimely treatment or failure or misdiagnosis, the facial expression muscle will still be paralyzed on one side after 1-6 months of onset. The higher the site of peripheral facial nerve palsy. The greater the degree of facial nerve damage, the slower the recovery and the longer the course of treatment. The lower the site of onset, the smaller the damage to the facial nerve and the faster the recovery. Clinical studies have found that the recovery time is shortest and the outcome is best for the segment below the bulbar (including the stapedial foramen and beyond) (FP4), while the recovery time is better and the duration of treatment is slightly longer for the segment below the stapedial muscle branch to the bulbar (FP3). The segment below the geniculate ganglion to the stapedius muscle branch (FP2) The damage to the geniculate ganglion and above (FP1) had the longest recovery time, the worst efficacy, and a long duration of treatment.