Chickenpox is an infectious disease caused by varicella-zoster virus. Chickenpox is mainly due to the infection of varicella-zoster virus, the virus enters the human body will firstly proliferate locally in the respiratory mucosa and enter the human bloodstream to form the first viremia, and the patient may then have symptoms of upper respiratory tract infection such as sore throat, runny nose, and fatigue. Then varicella-zoster virus can be replicated in the reticuloendothelial system to form the second viremia, and spread to the skin keratinocytes and mucosal epithelial cells, causing cellular vacuolar degeneration and the formation of erythema, papules, blisters, accompanied by itching and so on. Chickenpox is an infectious disease, so people who have close contact with chickenpox patients or incubating patients, immunocompromised people, or people who use immunosuppressants for a long period of time are at high risk of chickenpox. It is recommended that patients with suspected symptoms of chickenpox should go to regular hospitals in time to get a clear diagnosis and standardized treatment.