Chickenpox is caused by the varicella-zoster virus infection and is usually most severe in children on the 3rd-4th day of illness. Chickenpox is a relatively common infectious disease caused by varicella-zoster virus infection. Symptoms are most severe in children during the rash phase, i.e. days 3-4 of illness. The rash begins on the trunk and head and then spreads to the face and extremities, initially as a red rash that becomes a papule and develops into a herpes within a few hours. Typically, chickenpox is a self-limiting disease that heals on its own in about 10 days. In addition, during the onset of the child should pay attention to a light diet, avoid staying up late, pay attention to rest, and replenish sufficient water, can be a quicker recovery.