Need to squeeze and clench body because it feels tickly

[kedarling]

Since I was very young, I have had a problem in which my upper body and especially my arms and hands feel very tickly on the inside and I need to clench and squeeze myself hard sometimes over and over again to rid of the sensation. When it is bad I clench so much that I put so much pressure on my chest it begins to hurt. I also notice I feel like I am not getting enough air, and I am not sure if this is from squeezing my chest or what. What is the tickly feeling from that is unbearable and makes me need to squeeze over and over again until I feel like crying.