my baby is sucking fingers what is the reason behind it

A. Babies explore everything with their mouth. The first thing they will start to recognise is their fingers and then hands. After being amazed to see them they want to know what or how it is so they put them in their mouth. As they grow older, they start to put everything they see in their mouth because of this simple reason, to explore. So u need not worry about this. Just keep the baby's fingers clean and trim the nails. Make sure there isn't any objects which can cause choking hazard around the baby. Keep her surroundings hygienic and clean. Try to remove her fingers from the mouth whenever possible and divert her attention by showing new toys, singing to her or playing with her. U can use mittens, but she will start to put them in her mouth too.