Mera baby 2month 20 day ka hai vo apna lower lip baar baar mu ke Ander krta rhta hai iska kya means hai??? pls help me

A. Look usually kids behave like this when they start to have their teeth and that happens after completing the time of three months so right now your child is doing it either the process has started earlier your child is just doing it generally and that can also be seen with some kids