Postherpetic neuralgia is one of the most common complications of herpes zoster and refers to a neuropathic pain syndrome in patients with herpes zoster that occurs in the lesion area for more than 1 month after the herpes has healed. Its etiology is mainly caused by varicella zoster virus infection and its incidence is quite high. It is particularly prevalent in the middle-aged and elderly population, and has heavy, lingering and intractable clinical symptoms. The problem of postherpetic neuralgia treatment is a worldwide medical problem, and there are many ways to treat it, but there are still not many methods with rapid results. Some people advocate nerve destruction for stubborn cases. We have found that the destruction of the nerve sheath by the virus and the exposure of the nerve fibers are the main pathological basis of the syndrome, so repairing the nerve envelope is the key to treating the disease. Therefore, repairing the nerve envelope is the key to treating the disease. We have developed a Chinese herbal ointment with the effect of pulling out the toxin and generating muscle for external application, which is clinically proven to be effective quickly, generally taking 1-2 days to work and curing in a week or so.