Frozen shoulder, or adhesive capsulitis, is a condition that causes pain, stiffness, and limited movement in the shoulder joint. As a result, the tissue around the shoulder joint (the capsule) becomes inflamed, thick, and tight. Additionally, it often develops slowly and can make daily tasks—like reaching, dressing, or brushing your hair—difficult. Also, most common in adults over 40 or those recovering from injury or surgery, it can...