Chickenpox is an acute infectious disease caused by varicella-zoster virus infection. Unvaccinated people are generally susceptible to the disease, and it is especially common in young children, preschoolers, and school-age children. Chickenpox is mainly caused by the initial infection of varicella-zoster virus, which can be spread through respiratory droplets, direct contact and indirect contact. Chickenpox usually has an incubation period of two weeks, and during the infection period, patients may have fever and malaise, but they are mild. Chickenpox develops 1-2 days after the onset of fever and has a centripetal distribution, appearing on the trunk and head, then gradually spreading to the face and limbs. Chickenpox is mainly pink in color and can become oval or mung bean shaped after 1-2 days, and the herpes dries up and crusts over 3-4 days. The skin usually peels off in a week or so, and there is no scarring after peeling.