If the baby has pus after BCG injection, if the child does not have fever and other uncomfortable symptoms, it is generally considered to be due to the unique nature of the BCG vaccine caused by the symptoms, generally do not need to worry too much. It should be noted that it is recommended to disinfect the area with iodine swabs 1-2 times a day, and to avoid water to avoid infection. If you want to give your baby a bath, you should also protect the area with clean gauze, so as not to aggravate the pus and cause infection after getting wet with bath water. Under normal circumstances, the vaccination site will heal in about 2-3 months, but if your baby develops fever and other symptoms at the same time, you need to take your child to the doctor as soon as possible to treat the symptoms.