Generally in spring and autumn, shingles is prone to occur. After going to the hospital for treatment, the skin has recovered, but in winter, there is always pain, why is this? Shingles is a skin disease with both skin damage and neuralgia. Just because the skin damage is cured does not mean that shingles is recovered, and shingles can leave sequelae if not treated in time and in an improper way. The main sequelae of shingles is post-herpetic neuralgia. Why does it still hurt after being cured? The pathogenesis of postherpetic neuralgia is not yet clear. Its occurrence may be related to changes in the normal form of nerve impulse afferents, as well as untimely treatment, low resistance or immunity of the patient, the patient’s idiosyncratic constitution, degeneration of damaged nerve cells and exposure to chronic irritation. Chinese medicine’s understanding of the etiology of acute herpes zoster: the cause of acute herpes zoster is external poisonous evil (virus), the evil Qi stays in the body, wrestling with Qi and blood, blocking the meridians, stagnating in the internal organs, so that the flow of Qi is blocked, the meridians are blocked, and pain occurs. The internal cause is internal injury, liver stagnation and fire or spleen and dampness, resulting in poisonous fire, liver fire, damp heat, and mutual knotting, blocking the meridians, resulting in blood stasis and qi stagnation, and pain if not pass. The postherpetic neuralgia is a very intense and stubborn pain that is very painful for the patient, and the pain continues even after the lesions are eliminated.