In patients with facial nerve palsy, the cheek puffs and whistles leak air because the affected side of the mouth cannot be closed. Facial nerve palsy (facial neuritis, Bell’s palsy, Hunter’s syndrome), commonly known as “facial palsy”, “crooked mouth”, “crooked mouth”, “hanging wind” is a common disease characterized by motor dysfunction of the facial expression muscle groups, the general symptoms are crooked mouth and eyes It is a common and frequent disease, and it is not limited by age. The patient’s face is often unable to perform even the most basic movements such as raising the eyebrows, closing the eyes and puffing the mouth. The examination methods for cheek puffing and whistling leakage: 1. EMG: By using needle electrodes inserted into the facial muscles and recording the action potential, for example, when the nerve is cut, the muscle loses the ability to contract, the action potential will immediately disappear, and on the twelfth day after the axon is completely blocked, the current activity completely disappears, and then there will be a spontaneous continuous fiber tremor potential, then it means that the nerve degenerative condition has occurred. If the fibrillation and motor unit potentials have disappeared, then the muscle is completely fibrotic and there is no longer an indication for surgery. 2. Neurography: The facial nerve branch at the mastoid foramen is stimulated by bipolar stimulation, similar to the maximum stimulation test, and the difference between the two sides is compared, i.e. the percentage of nerve degeneration. When the degeneration rate reaches more than 90% in two weeks, the value is not fully recovered. Since this test is not able to identify the degree of damage as axonal disintegration or nerve disintegration, it can only be used to assess the likelihood of nerve failure to recover.