Hello, I have a 3 month old baby.she has some blisters on her hand and feet,not itchy .her doctor says that it is because of insect bites attack and gives mupirocin oilment for it.And I always properly covered her hand and feet.when old blisters disappeared,then new blisters again comes in other positions of hand,like spreading(1 finger to another). Why such happens? Is any medicine to completely treatable to this? Pls reply