Frozen shoulder — medically known as adhesive capsulitis — causes stiffness and pain in the shoulder joint, often making sleep especially difficult. Many people with frozen shoulder realize that having the best sleep position for frozen shoulder can significantly reduce nighttime discomfort and improve sleep quality. https://holdenukbs14814.wikifordummies.com/9264154/choosing_the_right_pillow_for_frozen_shoulder_a_complete_guide