The shoulder trades stability for range of motion more than almost any other joint in the body, which is exactly why it's so prone to pain and restriction. A shoulder that's stopped moving freely tends to stay that way until something actively restores the motion.
Why shoulders get stuck
Poor posture pulls the shoulder blade out of its ideal position, rotator cuff muscles tighten up from overuse or disuse, and old injuries leave scar tissue that limits motion. Once movement starts hurting, the natural instinct is to avoid it — which only lets the restriction get worse.
Restoring the motion
Treatment combines adjustments to the shoulder and upper spine, soft-tissue work to release tight rotator cuff and chest muscles, and progressive mobility exercises that rebuild range without re-aggravating the joint.
What to expect
Shoulder recovery is rarely linear — mobility often improves faster than pain resolves, or the other way around. A treatment plan that adjusts based on how the joint is actually responding tends to get better results than sticking rigidly to a generic timeline.
When it's more than a stiff shoulder
Sudden loss of motion, inability to raise the arm overhead, or pain that wakes you at night are worth getting checked promptly — they can point to something needing a different approach than a typical restriction.