Herpes zoster is a disease caused by varicella-zoster virus infection, which is contagious and can be spread through the respiratory tract or by contact with the blister fluid, with a higher likelihood of transmission due to daily living together in the family. Herpes zoster is contagious and can be spread through the respiratory tract or through contact with blister fluid. Generally, people who are immune to varicella-zoster virus are not easily infected, and it is mainly infected to children who are not immune to this virus, so they should pay attention to isolation. Varicella-zoster virus causes primary infection in people with low immunity, and varicella or latent infection occurs. The virus can then remain latent in ganglion cells such as spinal nerves or cerebral nerves for a long period of time. When activated by certain factors, the virus can travel along the ganglion’s innervated nerves to reach the skin, causing recurrent infections known as herpes zoster. If there is any discomfort, it is recommended to seek medical advice and treatment promptly.