A group of disorders that occur when certain blood vessels or nerves are compressed.
Thoracic outlet syndrome affects the space between the collarbone and first rib (thoracic outlet). Common causes include trauma, repetitive injuries, pregnancy, and anatomical defects, such as having an extra rib.

Symptoms include pain in the shoulders and neck and numbness, weakness, and coldness in the fingers.

Treatment involves physical therapy and pain relief. In rare cases, surgery may be needed to relieve the compression.