So I always have had this pain in my right arm when doing arms. It's like when I'm holding onto a weight my arm is fine, but as soon as I take the tension away by putting the weight down and opening my hand. I get this horrible pain on the top part of my arm . Usually it goes away a little bit after. But today after doing Triceps it is still there just throbbing. Anyone ever experience this or have any idea what it is?