Postherpetic neuralgia is a particularly stubborn and intractable pain, for which pharmacological treatment is preferred. It is divided into the following drugs: 1. Drug therapy: use of non-steroidal anti-inflammatory and analgesic drugs, drugs that nourish and adjust the nerves, and anticonvulsants. Because many patients have long-term intractable pain, depression and anxiety may occur, at this time, antidepressants and anti-anxiety drugs can be chosen for treatment; 2. Nerve block therapy: used for those who have poor results of medication or have severe pain at the first visit. Nerve block therapy is more accurate and effective in the treatment of postherpetic neuralgia. More than 90% of patients can be relieved or alleviated by nerve block treatment; 3. Minimally invasive interventional nerve destruction: if conservative treatment does not work well, you can choose to do minimally invasive interventional nerve destruction; 4. Surgical treatment: do the dissection of the dorsal root of sensory nerve root.