Chickenpox is an acute respiratory infection caused by varicella-herpesvirus infection, which is spread mainly through contact and respiratory droplets, and adults who come into contact with children who have chickenpox are at risk of being infected. Chickenpox is highly contagious and most often occurs in preschool children. If an adult is infected with chickenpox at a time of low resistance, has not previously been infected with the chickenpox virus, or has never been vaccinated against chickenpox, and comes in contact with a sick child, there is a high risk of contracting chickenpox. Adults who have been previously infected with the chickenpox virus will not usually be re-infected, and those who have been vaccinated against chickenpox will have milder symptoms or an atypical herpes, such as no accompanying fever or a low fever temperature, even if they are re-infected. If adults who have not been infected with chickenpox are infected, the symptoms are more severe than in children and can easily lead to complications such as pneumonia and encephalitis. Adults with chickenpox have a significant fever, the herpes can be spread throughout the body, and the chickenpox can be large. The adult should take care of the child with chicken pox, pay attention to the prevention of infection, wear a mask, wash hands regularly. The adult infected with chicken pox also needs to be isolated to avoid infecting others, and to prevent complications to avoid further damage.