Patients are often confused when I inform them that the biceps (long head of the biceps) is to blame for their shoulder pain. Most think of their biceps as the “Popeye” muscle at the mid portion of the upper arm.
To understand why the biceps can play a role in shoulder pain, we need to understand a little anatomy. The long head of the biceps takes a right-hand turn as it dives into the shoulder joint, attaching at the labrum, which is a cartilage rim around the cup, or the glenoid, of the ball and cup shoulder joint.
