It is a normal phenomenon that the pus from the BCG vaccine has turned into pus, pay attention to protect the local area, usually no special treatment is needed. If the pus is serious, you can follow the doctor’s instructions for local disinfection, anti-infection and other treatments. BCG vaccine is a live attenuated vaccine, mainly used to prevent tuberculosis infection. About 2 weeks after BCG vaccination, the vaccination site will show different degrees of redness, swelling, infiltration, pus, and the formation of small ulcers. If the symptoms are not serious, they can usually heal on their own, and no special treatment is needed to avoid contaminating the area. Some babies have serious pus at the vaccination site and need to take necessary treatment. For example, the use of povidone-iodine swabs to disinfect 1-2 times, avoiding local water, so as not to cause infection; can also be used 1 ℅ gentian violet smear ulcers or pus, to prevent infection. In addition to the vaccination also need to observe whether there is fever and other symptoms, if there is fever, allergy, lymph node swelling, abscess enlargement and other serious adverse reactions, need to be admitted to the hospital in time for observation and treatment, to avoid delays in the baby’s health caused by a greater impact.