I was curling the other day when I felt like popcorn was going off in left elbow. After this, I can't supinate my hand without pain. Im also experiencing pain straightening my arm and also raising it. It doesn't hurt as bad today as yesterday. What does this sound like?
Sounds like an injury to the distal biceps tendon.
It may be a Bicep Tendonitis. But if it is not a Bicipital Tendonitis, it could just be a Tendonitis dynamic of increasing muscle tightness and connective tissue shortness which is causing this problems. To get rid of it, you can relax muscles, reduce inflammation. Even go to some spine surgery center nj for doctors advice on this.