I delivered my son in mt.A , they put his BCG jab in his butt not sure why .. But along with a health booklet they gave a paper regarding the bcg that it will cause swelling and not to worry
but dear son had pus in that , it was very painful for my son coz my son got cranky and cried a lot when we carried him
my super hubby removed the pus from the spot by squeezing it out and put antiseptic powder there ..we didn't get him wet on his butt for 2 days .. It got healed well ..
So pls dont't try what my hubby did ...
You can get a second opinion from other mummies here
But it's really painful for the little ones
hope your daughter gets over this soon