My little boy is turning 4 yrs. old in October and he keeps having these weird sensations on his fingers, toes and buttocks. He has had a couple of episodes where he couldn t sleep because of this tingling sensation. He ends up stiffening up and clenches his fists and curling his toes. He informed me that it doesn t hurt, but that it bothers him a lot to the point that he cries and screams from frustration. I was wondering whether it is connected with him having a tiny hole in his heart ( I ve forgotten the term used for the condition), but this defect is apparently not life-threatening and he can function as a normal boy according to the cardiologist. What do you think it is? What should I do? Thank you.