If you have the urge to scratch your forearm, or you feel like it's tingling, you might have Brachioradial pruritus. Sun exposure and/or spinal issues might be at fault. Treatments range from ice packs to physical therapy to medications and possibly surgery.
Brachioradial pruritus is a nerve disorder that causes itching, stinging, or tingling sensations in this area of the outer forearm. Brachioradial pruritus usually affects both arms, but it can occur in only one arm. In rare cases, the urge to scratch spreads to other parts of the body, including the shoulders, neck, and lower legs. This condition is not contagious. This condition is invisible, except for patient self-harm due to scratching. The emotional component of suffering BRP is as important as the physiology. There is no magic bullet cure.
For further medical information please go to Resources Page
For the story of how I am successfully managing my BPR without drugs go to my blog