I'm so glad to see I'm not the only mom with a 5 year old who still sucks her thumb (and happier still that I'm not the only mama who isn't sweating it). I have also worried about potential problems: braces, speech ... but she's a great little talker, and I think she'll either have teeth like mine (braces, please!) or like my husband's, if she's lucky (beautiful and never needed anything done.) My daughter has been sucking pretty much since she was born. But once she started preschool, we decided on a rule, which has worked out great. The rule is: thumbsucking is only OK when she's sick (because it's a comfort tool) and when she's going to bed at night. I never shamed her about it. But if I caught her thumb in her mouth, I'd say - OH NO! ARE YOU SICK? And she'd laugh and take her thumb out. Then she remembered the rule easily, and she stuck to it. Now, the pediatrician, at her 5 year check up, told her that she needs to stop altogether. But she didn't seem to pay him any mind. NOW - if the dentist told her to stop, she'd probably listen. An authority figure like a doctor can really bend a little one's ear sometimes - in a way a parent cannot. So far, however, the dentist hasn't said anything. When I was little I sucked my two middle fingers, and my parents used the "something that tastes awful" to break me of it. I think it was around when I was 5. I don't remember well, so I guess it didn't scar me. For my daughter? I'm hoping time, maturity (and the dentist's advice) will be all she needs to outgrow it.