Varicella is caused by varicella-zoster virus (VZV), a DNA virus whose only natural host is human and which has dermatophilic and neurological properties and which replicates in local mucous membranes after respiratory infection and enters the bloodstream to form viremia, followed by varicella. The disease is highly contagious and is mainly spread by droplet transmission, but can also be spread by direct contact. It is common in children, but can be contracted at any age. The symptoms of chickenpox in adults are often more severe, caused by a decline in immunity, and there are complications such as disseminated nodular pneumonia in both lungs, chickenpox encephalitis, and myelitis, with a mortality rate of 10%-40%. The most important thing is that you should avoid going to public places where there are a lot of people, and it is best to wear a mask when you go out; if you have chickenpox patients at home, you should do a good job of respiratory isolation, and the air and objects contaminated by the patient’s respiratory secretions or rash herpes should be disinfected in time. children and adults over 1 year old who have not had chickenpox should be vaccinated with live attenuated chickenpox vaccine if possible. If you have fever, skin blistering rash and other symptoms, you should go to a regular hospital dermatology clinic in a timely manner and not take it lightly.