Thoracic outlet syndrome (TOS) is compression of the nerves or blood vessels passing through the space between the collarbone and first rib, producing arm pain, numbness, and weakness. Symptoms can develop gradually or after a specific injury, so early evaluation matters when function starts to decline.
Most patients with thoracic outlet syndrome improve with conservative care — targeted physical therapy, image-guided injections, bracing or supportive footwear when relevant, and activity modification. When conservative care isn't enough or imaging shows structural injury that won't heal on its own, our specialists offer the next-step procedures discussed below.
Below, we walk through the anatomy involved, the symptoms and causes we most often see, how we diagnose thoracic outlet syndrome, and the full range of treatment options — from the simplest to the most involved.