C.C.
My daughter is almost 3 and is a thumbsucker. She has developed quite an overbite b/c of it. She was just at the dentist last week and the dentist told us we should plan on trying to get rid of the thumb-sucking before her permanent teeth come in. She said by around 4 1/2 or 5 yrs, we would like her to no longer suck her thumb. She said don't worry about her teeth, typically they will shift back once she stops sucking, and that since it is a soothing thing for her right now, there's no need to worry about it. Usually they will wean themselves off of the thumb. Remember that it is soothing to her. I wouldn't put anything on her thumb that is nasty tasting or try to fool her with anything. If you still want her to stop, use gentle reminders but still let her suck her thumb at bedtime or when she is tired, then gradually weaning that out. Good luck.