Snake sores, also known as snake gall sores and spider sores, scientifically known as herpes zoster, is a very common viral infection in dermatology, and the virus that infects it is varicella-zoster virus. A portion of patients with herpes zoster who are not properly treated or cared for, or who are themselves in poor physical condition, or who are elderly, may develop postherpetic neuralgia after treatment, which is one of the more difficult to deal with or tricky postherpetic reactions to this disease. Treatment has the following aspects: 1, oral pain medication, such as pregabalin, gabapentin, etc. 2, the use of physical therapy, such as semiconductor laser, helium-neon laser, the God lamp and other irradiation of the local area. 3, the use of traditional Chinese medicine methods, such as acupuncture, fire acupuncture, and in the lesions of the local closure of the drug. If the phenomenon of pain in the later stage occurs, it is necessary to go to the dermatology department of the regular professional hospital as soon as possible.