How to change the bad habbit of my baby

I'm assuming this is your first child? And that you haven't grown up around many children or any children? All kids tug at their parent or other people's hair. They will automatically grow out of it but in the meantime you can either put up with it or keep your hair tied back behind your head so he can't reach it. Ask anyone else who's had a baby if their child did not pull their hair at some time or other, it's a natural thing and doesn't mean your child is extra naughty or anything just as when babies are teething they try to bite everything in sight to get relief on their gums.