G.B.
Hello, my no 25 yr old daughter sucked her thumb up till she was in the 6 th grade. I tried everything, even talked to her doctor. She suggested taking to the dentist to see if it was interferring with her development with her teeth. There was no problems there, so her doctor just said to let her stop on her own. The embarrisment of sucking her thumb in frunt of the other kids may maker her stop. She did stop durring the day unless she was upset or stressed out. She did suck on her thumb at night for a long time. Now as an adult, she sleeps with her hand next to her face.
I now have a 3 yr old son who is sucking his tounge. His doctor to ld me to do the same thing. Let him stop on his own. this is a comfort issue, there may be some behavior problems, if he/she is forced to give up a comfort device.
good luck