I don't think its that kinda of a big deal, anyway if you really concerned about this maybe you can put some thing that doesn't taste that good to him(but sure is safe!)
I'm telling you this because we tried everything u can imagine with my sis daughter and nothing stopped her from that habit
now she is 6 years old and she stopped doing it at 5 by herself
Re: [el-shella] Thumb in the mouth
I don't think its that kinda of a big deal, anyway if you really concerned about this maybe you can put some thing that doesn't taste that good to him(but sure is safe!)
I'm telling you this because we tried everything u can imagine with my sis daughter and nothing stopped her from that habit
now she is 6 years old and she stopped doing it at 5 by herself
Good Luck
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