Rotator cuff tears
It’s also highly possible to partially or even completely tear a shoulder tendon, either because of a repetitive motion or a direct trauma, like a fall.
The pain of such an acute tear, which happens suddenly, might be, in fact, excruciating. However, shoulder pain, weakness, and stiffness of a chronic tear only worsen in time, so you won’t even notice when they start. When it comes to rotator cuff tears, rest, ice or heat, and some NSAIDs will help.
Your doctor will probably suggest physical therapy in order to strengthen your shoulder muscles, but also to improve the mechanics of your shoulder joint, but also will provide you with some exercises that you can do at home.