Swelling at the place of vaccination is a normal situation, generally with time can disappear on its own, you can also accelerate the speed of swelling through hot compresses and other ways. Some reactions may occur after vaccination, for example, about two weeks after BCG vaccination, local redness and swelling may occur, and local redness, swelling and pain may also occur after the aggravation of whooping cough, diphtheria and tetanus toxoid mixture. The swelling usually subsides gradually and does not require special treatment. In addition, after vaccination, you should stay in the hospital for 30 minutes for observation, during which you can consult your doctor for redness, swelling and other discomforts. If redness and swelling appear after observation, you can accelerate the swelling through hot compresses and other methods, and at the same time, you should pay attention to rest, avoid exertion, and supplement nutrients appropriately to avoid aggravating the reaction. If the redness and swelling do not subside for a long time, or even pus, ulcers and other symptoms, it is recommended to go to the hospital for examination in a timely manner, under the guidance of the doctor to deal with.