Thoracic Outlet Syndrome is a rare condition that occurs when the blood vessels or nerves in the space between your collarbone and your first rib (thoracic outlet) become compressed.

It causes pain in the neck and shoulder, numbness and tingling in the fingers, and a weak grip.

Blood vessels and nerves coming from the spine or major blood vessels of the body pass through a narrow space near your shoulder and collarbone on the way to the arms.

Sometimes, there is not enough space for the nerves to pass by or through the collarbone (clavicle) and upper ribs. Pressure on these blood vessels or nerves can cause symptoms in the arms or hands.

View vascular disease patient stories, including stories about thoracic outlet syndrome patients.