BCG Vaccine Scar

Hello, mag3 months na si baby tsaka lang nagnaknak yung scar niya from BCG vaccine, is this normal po? hinahayaan ko lang po and if ever p9 na pumutok, may gamot po ba na pwede ilagay or leave it as it is after pumutok, or if pwede lagyan ng band aid?#1stimemom #advicepls #pleasehelp