C.C.
All these advice answers are awful. I was a thumb sucker well into my teen years. Of course I didn't walk around outside of my home like that! It is self soothing. There is nothing better than a child that can self soothe. The first time I saw my daughter suck her thumb I was so relieved that she could calm herself any time she need to. Think, she can do that if you can't be there. You don't need help, you need to understand where she is coming from. All you need to do is to help her understand that she needs to do it at home or in private so the kids at school don't mock her. If I had a rough day at school I would go to the bathroom for a suck break. Some adults take a cigarette break, well I took a suck break. Let her keep calming herself, it will all work out. Oh, and I have beautiful straight teeth that never needed any work! I still remember when my mom tried to get me to stop (i was 4). She put that stuff on it that tastes bad. I still remember that taste! She says now that she regreted doing that to me and now she understands and apologized for that.