Frozen shoulder — medically called adhesive capsulitis — causes stiffness and pain inside the shoulder joint, often making sleep especially difficult. Many people with frozen shoulder find that having the pillow to relieve shoulder stiffness can significantly reduce nighttime discomfort and improve sleep quality. https://codywvsm94837.wikibestproducts.com/2080995/choosing_the_right_pillow_for_frozen_shoulder_a_complete_guide