Do your forearms get sore because you're at the computer too much? You could rub your forearm with your opposite hand to sooth the muscles. Or you could spend $50 on a singularly-focused contraption. Guess which option Hammacher Schlemer is pushing?
The Forearm Pain Relief Massager looks kind of like a medieval torture device. You crank a couple of plastic rolls together and then push your arm through it. All this for $50? I'm not sure this is the smartest option available, but then again I'm no doctor.