My baby has a boil in the place of vaccine shot given. Is it normal??????

A. bcg vaccination which is given at birth in the upper arm will form a swelling by one or maximum two months and then it will burst open and then pus will come outf from it and after that it will become a scar mark. you have to take medical consultation if it days causing pain fever and discomfort to the child. also if the pus discharge is increasing or aggravating again you have to meetr the doctor and locally you can apply t bact cream.