Shoulder impingement
Shoulder impingement appears after performing a lot of overhead activity, such as swimming. Shoulder tendons and bursa are pinched between the bones of the shoulder, which makes it extremely painful to move your arm.
Different positions, such as overhead motion, reaching back, or even lying on the affected side, all of these might worsen these symptoms. Shoulder impingement can even weaken the rotator cuff.
In this case, physical therapy is absolutely essential to alleviating this kind of pain and preventing more damage. “One of the main jobs of the rotator cuff is to stabilize the joint, as any weakness might lead to further impingement, which creates an ever-vicious cycle.”