Herpes zoster is a common acute herpetic dermatosis, which is caused by varicella and herpes zoster virus. This virus invades the body through respiratory tract infection and lurks into nerve cells in the posterior root ganglion of spinal nerve or other pathological parts. This virus usually doesn't get sick. When the body's immunity declines (such as trauma, fatigue, cold, cancer, immune system diseases, etc.). ), the latent virus will multiply in large numbers, making the ganglia inflamed and necrotic. It brings pain to patients, and at the same time, the virus spreads down the nerve pathway, causing segmental herpes in the innervated area. Clinically, there are several clusters of herpes, which are arranged in bands and distributed along peripheral nerves, often unilateral, generally not exceeding the midline of the body surface, and mostly distributed in irregular bands. They are common in chest, abdomen, back and face, with burning sensation and neuralgia in local skin. At the initial stage of the disease, it is mainly manifested as general fatigue and weakness. Soon, the affected area felt burning pain. If it happens in the chest or waist, it is often misdiagnosed as heart disease or acute abdomen. This disease is equivalent to waist-wrapped fire pills, spider sores, snake string sores, fire sores, snake pills and flying snake pills, commonly known as waist-wrapped fire pills. "Shengjidan" can help poisons go out, improve the microcirculation of tissues around the wound, increase local blood flow, promote the growth of residual epithelial cells, remove putrefaction and promote granulation. By external application of plaster, it can detoxify and promote granulation, dredge channels and activate collaterals, quickly stop the spread of virus, repair nerves, remove viruses from the body, and make veins and qi and blood smooth without sequelae.