Thoracic outlet syndrome causes

What is a Thoracic Outlet Syndrome? Thoracic Outlet Syndrome (TOS) is a condition caused by compression of nerves, arteries, or veins in the thoracic outlet—the space between the collarbone and first rib. It can lead to pain, numbness, tingling, and weakness in the arm and hand. Common causes include poor posture, repetitive movements, trauma, or…