My daughter is 4 months old and is on formula feed. She continuously sucks her thumb. I try to stop her but then she starts crying. Is this normal or should be concerned.

A. Teething could be happening with your child because with whatever things you are mentioning in your question that is a very clear an evident that thing to understand that is that is what I can make out right now you can check the gums of your child this is going to give you a better clarity as per the situation