I would talk to your dentist. She may suggest a fixed palatal crib or other corrective device. The idea behind these devices is they take prevent the thumb from touching the gums and make thumb sucking uncomfortable. After a month or so, the habit is broken.

I would talk to your dentist. She may suggest a fixed palatal crib or other corrective device. The idea behind these devices is they prevent the thumb from touching the gums and make thumb sucking uncomfortable. After a month or so, the habit is broken.