The facial nerve anatomy is at the stem mammary opening behind the ear and exits the skull. When the head is stimulated by cold wind and cool breeze or blown by cold wind after sweating, facial nerve edema occurs and the facial nerve is stuck at the stem mammary opening, causing dysfunction of the facial nerve. The treatment methods are as follows: 1. hormone therapy, which can reduce facial nerve edema and at the same time restore facial nerve demyelination. 2. antiviral therapy, which can give patients oral ganciclovir. 3. nutritional nerve therapy, which applies rat nerve growth factor and also vitamin B. 4. improving blood circulation of the nerve, which can give patients static doses of drugs such as danshen chuanxiongzin. 5. acupuncture therapy, physiotherapy, and infrared physiotherapy can be performed, Infrared physiotherapy, etc. In short, facial palsy should be treated in a comprehensive manner.