Hi, habit...that is all it is...not nervousness or anything like that..just a habit.

My brother was like that at that age..there were some things my mom did back then, but I don't think I would do them now..like painting some yucky tasting stuff on them (it is made for that purpose) so they don't chew them..but..that never did end up working for my brother.

What worked for him you ask??
He justs grew out of it in time.

Hope that helps.
Susie.

Thank you susie, now I have hope for the future that my baby will grow out of this.