Chickenpox is caused by an infection with the varicella-zoster virus and is highly contagious. It can be spread through air or droplets by mutual contact. Once infected, the disease can generally be cured within about a week or ten days with proper treatment. During the treatment period, it is essential to drink plenty of water, avoid crowded places, and avoid contact with children or older people to prevent spreading the virus to others. It is also crucial to rest, avoid spicy and irritating foods, and not stay up late. If fever occurs, appropriate fever-reducing medication can be taken.