Chickenpox is a disease that can be easily contracted during infancy and early childhood, caused by varicella-zoster virus infection, mostly in preschool and school-age babies, with an incubation period of about 14 days on average. The rash appears within 24 hours of the onset of fever, and in some cases the rash appears at the same time. The rash appears first on the head and face, trunk, and finally on the hands and feet. The rash starts as a pink rash, becomes a papule after a few hours, and develops into a herpes in a few hours, oval in shape, 2-5 mm in size, surrounded by a red halo, and the chickenpox starts as a clear water droplet, gradually becomes cloudy, and the wall of the herpes is thin and easily broken. The skin is itchy during the rash attack, and after a few days, crusts start to form from the center of the herpes, which usually fall off naturally in 2 to 3 days, and the chickenpox lesions are superficial and usually do not leave scars after they fall off. One of the characteristics of chickenpox is that the rash develops rapidly, with a rash period of about 1 to 6 days, during which the rash appears in successive batches. The rash is a self-limiting disease, during the illness is mainly symptomatic treatment and prevention of secondary infection, as long as the proper treatment, usually will recover, will not leave sequelae.