Chickenpox is a common acute infectious disease in children. More than 90% of the total number of cases are children under the age of 10, and they will be immunized for life after the illness. If your child is very young or has low immunity, you should go to hospital immediately when he/she has cough, epilepsy, accelerates breathing, somnolence and other symptoms, or when the spots begin to suppurate and the surrounding areas become red.