Vaccination is actually an injection of a vaccine, which is also an attenuated or inactivated pathogenic microbial agent. Some children may have a fever after vaccination, such as Pepto Bismol, which should be treated differently depending on the situation as follows: 1. If the fever is only low, below 38.4℃, it can be observed at home first, and usually the symptoms can be relieved and disappear on their own after 2-3 days; 2. If high fever or convulsions or convulsions appear, it may be necessary to seek treatment at a hospital. If the child has the above symptoms, it is best to consult with a health prevention agency. Most fevers in children after vaccination are low fever. If it is only a low fever of 38.4℃ or less, you can observe it at home while drinking more water and eating more protein-containing or easily digestible food to promote the patient’s recovery as soon as possible.