The action of raising the arm above the head while sleeping is beneficial for the rehabilitation of patients with frozen shoulder, especially for those who are significantly limited in their upward movement, they can perform effective functional exercises before going to bed, and if they make it a habit, it is possible to achieve the purpose of exercise even while sleeping. If the arm is raised above the head, the horizontal height of the arm will be slightly higher than the heart, which will speed up the blood circulation back to the arm. If patients with upper extremity vascular disease or blood circulation disorders, there are some benefits to using this sleep position, but the benefits of this sleep position are limited, especially for healthy, normal adults, and there are neither benefits nor disadvantages to sleeping with the arm and shoulder joints held in this position. If it is a sleep habit, using this posture to get yourself to sleep quickly, this is also considered a benefit.