Why Do My Shoulder Joints Ache Deeply When I Lie on My Back?
1. Introduction Deep shoulder aching when lying on the back is primarily driven by nocturnal tissue compression, the loss of gravitational traction, and significant shifts in joint fluid dynamics. When standing upright, the sheer weight of the arm constantly pulls the humeral head downward, providing essential clearance for the tendons within the joint. Lying supine … Read more