Postherpetic neuralgia is among the most significant sequelae of herpes zoster, and in addition to postherpetic neuralgia, there can be skin ulcers, itching, and numbness. Other complications are relatively mild or easily resolved, so the focus needs to be on managing postherpetic neuralgia. There are many clinical treatments for postherpetic neuralgia, as follows: 1) oral medications, such as oral mecobalamin tablets to nourish the nerves, and oral pain medications; 2) topical creams, such as lidocaine cream to temporarily relieve the pain; 3) the most used and effective method is to inject botulinum toxin in the painful area, allowing patients to scratch the painful area with their hands first, and then injecting for the painful area Botulinum toxin, its treatment effect is more accurate, can obviously relieve the pain. If the pain is more stubborn, you can inject several times to relieve the pain.