I fucked my forearm extensor muscles on my record (left) hand from practising too much (not from wanking ). I put it down to trying to teach my bad hand to do really small and precise record movements like tears etc. I didn't scratch for nearly a year but it was still fucked. I did all the stretches the physio said for months, but it seemed to make it worse if anything. One day I read an article about foam rollers because I'm also trying to get my knee better after an op. The roller worked wonders on my leg muscles so I thought I'd try it on the forearm. 3 weeks later I was scratching again, although nothing too stressful. Since then it's gone from strength to strength, and I can pretty much do anything I did before without pain. I foam roll before and after every session religiously and it definitely works. I still get pain, but it's nowhere near what it was and it goes after a day. I also use one of these before and after: http://www.amazon.co.uk/Omni-Massage-Roller-Ball-Various/dp/B000ZJ3WEM The roller seemed to get rid of the scar tissue you get with an overuse injury. It's saved my life! Get rolling!