Okay when I do curls, palms up and hammers my forearm hurts like a mug. Its right around #4. Feels more bone related. I dont believe its a muscle pain. It sorta feels like either the pain is originating where the muscle attaches to the bone or where the tendons attach there. Its about halfway up my forearm. I can do reverse curls with no problem at all. Its really bad sharp pain, mildly immobilizing and lasts about 15seconds after doing a set of curls and then basically goes away. I can press on the area right around where the muscle meets the bone and it hurts pretty bad, even if it doesnt hurt when Im relaxed it will hurt when pressed on.