Hemifacial palsy may be caused by two factors. On the one hand, cerebrovascular disease is considered to be caused by cerebrovascular blockage or cerebrovascular hemorrhage that leads to hemifacial palsy. In this case, the patient mostly has tongue palsy, tongue deflection when extending the tongue, and may also have other stroke symptoms, such as unfavorable limb movement and numbness of the limbs, etc. It is recommended that the patient should promptly consult the neurology department of the hospital and have a CT examination of the head to clarify the cause before symptomatic treatment. On the other hand, if the patient has facial palsy on half of the face, tongue extension is not partial, and the nasolabial folds and frontal lines on the inside of half of the face can be seen to be shallow, it is considered to be caused by peripheral facial palsy and facial neuritis, which may be caused by feeling the virus or being cold or wind-blown. In this case, the patient should be given treatment to nourish the facial nerve, and dehydration should be given to reduce facial nerve edema, and acupuncture can be used later to help the patient recover from facial palsy.