Chickenpox is an infectious disease caused by the varicella-zoster virus, which is more common in children and is highly contagious, usually due to unintentional exposure to respiratory droplets and herpes fluid from a child with chickenpox. Once a child is found to have chickenpox, it must be isolated as soon as possible and then treated symptomatically. Since children are prone to scratching the skin at the herpes area during the onset of the disease, leading to secondary skin infections, parents must take good care of the child, keep the skin clean and cut nails regularly. If a child is found to have a persistently elevated temperature or other respiratory symptoms, he or she must promptly go to the hospital for examination to rule out complications such as chickenpox complicated by pneumonia or encephalitis. If there are no complications, you can usually recover completely in about 7-10 days with symptomatic treatment.