High lips on one side and low lips on the other side may be caused by physiological factors or pathological factors such as facial paralysis, sequelae of cerebral infarction, etc. The symptoms can be improved by physical therapy and surgery. 1. Physiological factors: Chewing with one side of the muscles for a long period of time may cause the lips to be high on one side and low on the other. It is possible to make the lips as symmetrical as possible by, for example, exercising the muscles on the side of the lips that is low, such as showing the teeth and chewing on the affected side to make both sides have the same muscle strength. 2. Pathological factors (1) Facial palsy: Facial palsy refers to paralysis of the facial muscles caused by damage to the facial nerve, which results in a high and low lip. The muscles controlling the facial nerve can be stimulated by external instruments, for example, electrical stimulation can be used to stimulate the facial nerve on the side with a low lip, so as to make the facial nerve re-excited and thus rectify the phenomenon of a high and low lip. (2) Post cerebral infarction: Post cerebral infarction patients may have the symptom of high and low lips due to the hemorrhage on one side of the brain, which may easily lead to the limitation of the activities on the opposite side, and can be treated by exercising the muscles on the affected side or promoting the awakening of the facial nerve. If the result is not satisfactory, surgery can be considered to correct the problem. For patients with high and low lips, they should consult a doctor in time to find out the cause of the disease, and once diagnosed, carry out rehabilitation as soon as possible, so as to avoid delaying the disease and preventing it from returning to normal.