my baby is 3 months 11 days old he sucks his hands and fingers and starts to gag no matter how much I feed him .. he still does that what should I do

A. hi dear The following are the most common signs and symptoms of teething: Drooling more than usual (drooling may start as early as age 3 months or 4 months, but is not always a sign of teething) Constantly putting fingers or fists in the mouth (babies like to chew on things whether or not they are teething)