S.F.
I had 2 thumb suckers and 1 finger sucker. They had a hard time stopping and once their teeth come out and adult ones grow in, its good to have them stop. I got a Thumb-guard for them. It straps around their wrists. It helped them stop without having those in the middle of the night re-entry. Both of my thumb suckers were relieved to have the help. I found it on line. Good luck. It was really helpful. I have shared it with several friends who found their kids felt the relief too. :)!!