chewing fingers

Why do children chew their fingers, (not nails)? The pediatrician says it is not uncommon, but I think it may be a nervous reaction to stress.

[Kevin Kennedy, Ph.D.]

To say it is not uncommon is not to deny what you are saying. Both things can be true. In other words, the behavior is not unusual (depending on the age of the child). It can occur because young children are very focused on their mouths and they put many things, including their fingers, in their mouths. It can also occur as a way to reduce tension and it is not really something that invites concern unless the child is obviously in distress.