Herpes zoster is not chickenpox, but both diseases are caused by varicella-zoster virus infection, chickenpox is the initial infection, herpes zoster is the performance of the virus latent and recurrent infection after the recovery of chickenpox, the specific differences between the two are as follows: 1. Chickenpox: is an acute infectious disease, there is a strong contagious, patients usually fever 1-2 days, and then the appearance of generalized spots, papules, herpes and crusts and other symptoms. After scabbing, the disease is not contagious. The chickenpox is mostly seen in children and is self-limiting. It will stop or subside at a certain stage, and the body can form antibodies after recovery, so it will not appear again, but the latent virus in the body will be activated later to cause herpes zoster; 2. When the body’s immunity decreases, the latent virus is activated and replicates in large numbers, causing nerve damage and skin damage such as clusters of blisters with localized pain on one side of the body or face. The disease is generally not contagious and requires early treatment with oral antiviral drugs and nerve-nourishing drugs.