It is now the season for a large number of vaccinations. Some children have fever, rash, diarrhea and other symptoms after vaccination, is this a “vaccine reaction” or a manifestation of disease? There are many febrile illnesses in children nowadays, so it is difficult to distinguish them. First of all, children should be in good health for vaccination: first, to achieve maximum vaccine effect, and second, to avoid aggravation of the original disease. Therefore, a professional doctor is required to examine and diagnose and evaluate the vaccine before the injection. However, some children have symptoms such as fever, rash and diarrhea after injection, how to treat them? If it is a vaccine reaction, the symptoms can generally recover on their own in 2-3 days. Generally, the symptoms are not serious and the fever temperature will not be too high, but if the temperature is greater than 38.5 degrees, or the symptoms are heavy and the spirit is poor, you should go to the hospital for examination and treatment in time. Vaccine reactions are related to individual constitution: Some symptoms vary in severity. Some vaccinations against chickenpox, leprosy, influenza and other vaccines show fever and rash, etc. Parents should not be nervous as long as the general condition is good. It is important to let the child drink more water, rest more, not get cold, and easy to digest liquid diet. However, some fevers caused by cold or accumulation of food should not be mistaken for reactions after vaccination; in particular, the early manifestations of some infectious diseases should be distinguished. To avoid delaying treatment.