4. Adhesive capsulitis:
This ailment features painful inflammation of the capsule, a fibrous, tough band of tissue around the shoulder joint. Adhesive capsulitis causes the shoulder to stiffen up. It results from chronic or sustained inflammation in the shoulder, especially after surgery or another procedure. The shoulder may become stiff and painful, especially when moving your arm.
If you take out the tissue to examine it, you will find a buildup of scar tissue that forms on the shoulder joint. This scar tissue develops over time and is progressive, reducing the elasticity of the capsule as it continues growing and making the joint stiff. That’s why this condition is also known as frozen shoulder, and it is seen mainly in older people with a history of trauma or interventions in their shoulders.