Nerve block: Nerve block is a technique that uses chemical (including local anesthetics and nerve-disrupting drugs) or physical (heating, pressure, cooling) methods to act around the nerve ganglion, roots, plexus, trunk and terminals so that their conduction function is temporarily or permanently blocked, which can block pain and can dilate blood vessels to nourish nerves by blocking sympathetic nerves. Commonly used nerve block sites are stellate ganglion block, trigeminal branch block, epidural block or paravertebral nerve block. Thoracic paravertebral intervention: thoracic paravertebral injection of the corresponding nerve root block can bring the drug close to the invaded ganglion, and at the same time act on the dorsal root ganglion, which is the necessary route of sensory transmission, causing its degeneration and necrosis, which can effectively block the vicious stimulation of peripheral sensory nerve transmission to the center and the vicious cycle of pain, and achieve the purpose of treatment. The operation has the advantages of minimally invasive, accurate localization, strong safety, repeatability, high efficacy and fast results. Once the interventional treatment for radicular neuralgia is successful, the results are rapid, the complications are few, the patients are easy to accept, and the interventional technique is less likely to cause serious complications such as fatal and disabling. The drugs now used in thoracic paravertebral nerve blocks are anhydrous ethanol, adriamycin and ozone.