Fever after vaccination may be normal, fever after vaccination needs to be alerted and seek medical help if necessary. Vaccination is the processed viruses and bacteria into the body, they will fight with the body’s immune system to form an immune response, thus fever and other uncomfortable symptoms. Therefore, it is normal to have a fever after vaccination. Most of the fever is low, and it will subside in 1 to 2 days without special treatment. However, if the symptoms of high fever or fever does not go away after vaccination, and the fever is accompanied by a variety of clinical symptoms, it may not be normal to consider the existence of other diseases in the body. Don’t take all the fever after vaccination as normal, but pay close attention to the fever and go to the hospital if you notice any irregularities.