I've developed a tingling sensation (intermittent) that feels somewhat like the sensation when a leg or arm "falls asleep". I can feel it from my right shoulder blade all the way to my right thumb. At the same time, I've developed an itching sensation along the top of my right forearm all the way to elbow. That entire area is now developing into what appears to be a rash, but not red and inflamed, just bumps. This has been going on for two + months and the rash is getting more pronounced. I do scratch frequently because it does itch. I am 60 years old, in excellent physical condition, I do get a lot of sun, and it looks somewhat like a heat rash from too much sun as well.