Hello! It looks like you have had a hard time getting an answer to your question. I am sorry about the confusion. I am going to try to give you a helpful answer. Remember, you do not have to accept my answer until and unless you are satisfied I have answered your question. I simply want to help you.
There are several reasons your child might be sucking her thumb. !) It might just be a habit developed as a baby and just never given up. 2) Your child finds security in thumb sucking for whatever reason. 3) It could be a form of attention seeking. 4) She might simply find it soothing There are probably many other reasons that could be gathered, but we will work from these.
Of course, the solution is much more important than the problem anyway:
1) I often tell my clients if what you are trying is not working, try something different. I know this sounds cliché, but it has been proven effective many times over. If you have tried the hard line approach and this has proven ineffective, try a softer less intrusive approach. Let her know you want to help her break the habit, but take on the role of support rather than being authoritative.
2) Give your child a designated thumb sucking area and time. Let her know that it is ok to suck her thumb but only for a limited time and location.
3) Give her other options besides thumb sucking, such as chewing gum, cuddling with a blanket, etc. Be creative. Ask your granddaughter if she can come up with any alternatives. Make it fun and give her responsibility.
4) Talk to her about. Dont make a big deal about it, but let her know you are a bit concerned . Ask her if she thinks maybe she is too old. Ask her when she would like to quit. She might surprise you with her response. This very well might be bothering her as well.
Honestly, most importantly, dont allow this to become too big of a deal. You will feel pressure to fix this behavior immediately. Family and friends will judge you for it. Do not allow peer pressure to cause friction between you and your grand child. Love her, encourage her, and guide her in the more important things in life. In time, this behavior will take care of itself. Focus on those things that might not.
I hope I have been helpful to you. i really do apologize for the service issues you have received. If you have any questions please post them here. If you are satisfied with my response, I hope you will leave positive feedback so I can be compensated for my time. I really do want to be a help!