Neck & Arm pain are common. Thoracic Outlet Syndrome is a condition where the nerves +/or the blood supply to the arm may be compressed.
ZOOM sur les symptômes liés aux maux de dos (Selon les vertèbres touchés)
The pull of a tight psoas. It is impossible to have a problem with the psoas that does not involve the aforementioned piriformis. Any problem with its next door neighbor quadratus lumborum will involve the psoas as well.
To roll out your Psoas, lie face down on the ground with a ball on some books. Place the ball on the books in your abs above your hip to one side of your belly button. Relax over the ball and lie face down on the ground. Breathe.