my DD is 3 (4 in summer) and sucks her thumb constantly
I'm sure it's affecting her teeth but I just cant get her to stop.
If you pull her thumb out, she puts the other one in.
I have said if she stops, she can choose a toy but that doesnt seem to encourage her.
I am hoping when she starts school in September, she may naturally stop from peer pressure but other than that, I have no idea what to do.