You lift your arm, and you feel intense pain that brings you to your knees. You haven’t had a recent injury, so you wonder: “why is my shoulder hurting just from lifting my arm?”
Several factors may be contributing to the discomfort. Before resorting to shoulder surgery, your doctor will often first recommend several sessions of physical therapy.
Before starting physical therapy, work with a physician to find the source of the problem. Any one of the following conditions can be the reason you have pain and are experiencing impairment.
Shoulder Impingement
Shoulder impingement is a syndrome where the tendons of the shoulder are inflamed. The tendonitis often occurs around the rotator cuff muscles or the supraspinatus muscles. In effect, patients have weakness, mobility limitations, and severe pain.
https://www.pinnacle-ortho.com/why-does-my-shoulder-hurt-when-i-lift-my-arm