Post-herpetic neuralgia (PHN) is a common complication of herpes zoster, which generally refers to a prolonged period of localized pain in the lesions even after the acute herpes zoster lesions have healed, and can extend for months to years in difficult-to-treat cases. There is still no specific treatment for postherpetic neuralgia. Western medicine uses neurotrophic drugs, analgesics, antiviral drugs, anesthetics, nerve blocks, neurectomy and other methods. It has been found that the external treatment of Chinese medicine has a better effect on it, especially the fire acupuncture therapy with other acupuncture therapy, can promote the recovery of damaged nerves in the late stage of herpes zoster, reduce neuropathic pain after herpes zoster, and improve the quality of life of patients. Modified fire acupuncture overcomes the shortcomings of traditional fire acupuncture and is more acceptable to patients.