Herpes zoster is an acute infectious skin disease caused by the varicella-zoster virus. Chickenpox occurs when children who are not immune to this virus are infected. Some patients become infected with the virus without developing symptoms. Because the virus is neurophilic, it can be latent in the neurons of the posterior root ganglion of the spinal nerve for a long time after infection. The rash is usually unilateral and distributed by nerve segments, with clusters of herpes consisting of pain; the older the age, the more severe the neuralgia. The disease occurs in adults and is more common in the spring and fall. The incidence of the disease increases significantly with age. How to prevent herpes zoster? 1, enhance physical fitness, improve the ability to resist disease. The elderly should adhere to appropriate outdoor activities or participate in sports, in order to enhance physical fitness and improve the body’s ability to resist disease. 2, prevention of infection. Infection is one of the causes of this disease. Elderly patients should prevent infection from various diseases, especially in the autumn season, cold and warm, to increase and decrease clothing at the right time, to avoid cold caused by upper respiratory tract infection. In addition, inflammation of the oral cavity and nasal cavity should be actively given treatment. 3, prevent trauma. Trauma can easily reduce the body’s ability to resist disease, which can easily lead to the occurrence of this disease. Therefore, elderly patients should pay attention to avoid trauma. 4.Avoid contact with toxic substances. Avoid contact with chemicals and toxic drugs as much as possible to prevent injury to the skin, affect the health of the body and reduce the resistance of the organism. 5.Improve nutrition. The elderly should pay attention to the nutrition of the diet, eat more soy products, fish, eggs, lean meat and other protein-rich treasures and fresh fruits and vegetables, so as to make the body strong and prevent the occurrence of various diseases directly or indirectly related to the disease.