when my baby is 4month 19march his back side head was hitted in car door and became reddish colour after some time and still now it's red in colour... is there any problem??? what to do ???

A. If Your child is not facing any issue no discomfort nothing abnormal in the behaviour then I don’t think so there’s anything to be worried about but the redness could be due to cradle Remover also and touch that part if you feel that your child is having pain then you should get a check with your paediatrician