My little one regularly pinches a bit of skin from the front of her neck between her index and thumb and fidgets with it. This usually happens while she is sucking her thumb. It has gotten to a point where she is hurting herself and one can see clear marks of her own scratches with scabs forming at times. It's been going on since she was born but now that she is 5 and stronger she is hurting herself. What can one do? Please help! ... View more