Chickenpox vaccine commonly occurring adverse reactions mainly include: fever, redness, swelling, pain at the site of vaccination, skin rash, rare occurrence of platelet allergic purpura, fainting, and so on. Varicella vaccine can prevent varicella-zoster virus infection, prevention of chickenpox, herpes zoster, should be timely for the child to be vaccinated, at present, the general recommendation for children as early as possible to receive 2 doses of varicella vaccine, respectively, at the age of 1 year and 4 years old when the vaccination. Varicella vaccine is generally mild adverse reactions after vaccination, common for the vaccination site pain, redness and swelling, usually within 2-3 days of self-relief; vaccination 1-2 weeks after the emergence of low to moderate fever, usually lasts for 1-2 days, you can increase the amount of drinking water, reduce clothing, and if necessary, the use of ibuprofen and other medications to reduce the fever; usually within 1 month after vaccination, rash, mild symptoms of the person with the main purpose of observation. Rarely appear serious vaccine reaction, such as anaphylactic purpura, shock, fainting, etc., this situation needs timely medical treatment. Varicella vaccine is a self-funded vaccine that is necessary to be vaccinated, and generally the adverse reactions after injection are mild. Parents are advised to observe closely and seek timely medical treatment if necessary.