Why do I have a tingly sensation on my back?

It started when I was very young (I'm currently 17), the right side of my back tingles as if bugs are crawling on it. Typically when this bothers me most is when I'm trying to rest, so much so that I'm unable to lie on my left side for I'll be uncomfortable throughout the night. Most times it prevents me from sleeping and occasionally it disturbs me during the day when I'm sitting upright to where I'd have to place my hand on my back to sooth the nerves. Recently I had a message that consisted of these cups being placed on my back and although I wasnt lying on my back I was relieved for the rest of the evening. The feeling has then since come back and I'm looking for a long term solution. Any ideas as to what this could be or how to help it?