does it hurt? It is recommended to provide clear pictures of skin lesions, so herpes should be considered. If it hurts, consider herpes zoster. Herpes zoster, commonly known as "waist-wrapped dragon", is caused by varicella-zoster virus and distributed along nerves. Erythema and blisters are the main skin manifestations, and most of them are accompanied by obvious pain. About 1/3 of the population occurs in their lifetime, and it can occur at any age. The incidence of complications increases with age, reaching 68% over 5 years old. Children and young adults have mild symptoms, and the elderly and immunocompromised people have high morbidity and mortality. After varicella-zoster virus infects people, it turns into recessive infection. The virus lurks in the neurons of spinal nerve or sensory ganglion of cranial nerve, and becomes ill when immunity is reduced or when fever and fatigue occur. Skin lesions are erythema, clustered herpes or blisters. Most of them are distributed unilaterally along the nerve. A few of them have multiple nerves or bilateral nerves. Some of them may have disseminated distribution of blisters. The degree of pain varies, and it can be severe or no obvious pain. Most patients have pain first and then a rash. The course of the disease is self-limited, mostly about 2 weeks. Basically no recurrence. Some patients can leave behind neuralgia. The intercostal nerve and the first branch of trigeminal nerve are most commonly involved, followed by cervical, lumbosacral nerve. Contact and air transmission, the infectivity is lower than chickenpox, and the infectivity decreases with the healing of rash. The main treatment is antiviral therapy, with oral acyclovir tablets, calamine lotion and acyclovir cream for external use, and nerve-nourishing drugs such as furathiamine and mecobalamin as auxiliary materials.