Coworker: ive got this knot in my shoulder that's killing me!
Coworker: right here, between my shoulder blade and spine.
Me: do you sleep on your side?
Coworker: yeah, how'd you know?
Me: do you keep your arms tucked together in front of you?
Coworker: yeah, how'd you know?
Me: try folding a blanket or tucking a pillow between your arms when go to bed today. Our shoulders aren't designed to stay in the hunched position for very long. By keeping something between them while you sleep, it relieves the tension on your shoulders and allows your muscles to actually relax and heal.
Coworker: omg, my shoulders feel like NEW!! how'd you do that?
Me: 80% of my shoulder pain came from sleeping on my side like that until I got a body pillow. Im telling you, it saved my life.