My arm has been really sore for about 3 days now. I somehow pulled a muscle in my arm. The pain is in my upper arm kind of just below my shoulder. It aches all the time, but actually hurts if I try to lift something or move it suddenly.
I don't know how I hurt it. I do work out daily but I didn't feel any pain after any of my workouts. I also don't remember jerking it or anything like that. I am still working out although I move my right arm really slowly and my left arm keeps pace with the workout.