What is Thoracic Outlet Syndrome?
The thoracic outlet is a narrow passageway located between the neck and shoulder. Important nerves and blood vessels travel through this space to supply the arm, chest, and shoulder blade. Because this area is relatively small, any reduction in space can lead to irritation or compression of these structures, resulting in what is known as thoracic outlet syndrome (TOS).
This narrowing may occur due to neck injuries, repetitive arm movements, prolonged overhead activity, or anatomical variations such as an additional rib in the neck region.
Signs and Symptoms
Symptoms vary depending on whether nerves or blood vessels are being compressed. Most cases involve pressure on the nerves rather than the arteries or veins.
When nerves are affected, people may experience sensations such as tingling, pins and needles, or numbness in the arm. Pain, weakness, or fatigue—especially during activities involving overhead arm use—are also common. Some individuals may notice neck discomfort or headaches that start near the base of the skull.
If a vein is compressed, swelling, colour changes, and discomfort in the arm may occur. When an artery is involved, symptoms can include cramping in the arm or hand during activity, along with feelings of coldness or visible colour changes due to reduced circulation.
Who is Most Commonly Affected?
Thoracic outlet syndrome is often seen in individuals whose work or activities require frequent overhead arm positions. Examples include tradespeople working above shoulder height, hairdressers, teachers writing on boards, or athletes involved in overhead sports.
How Physiotherapy Can Help
A physiotherapist will typically assess posture, spinal mobility, neck muscle flexibility, and how you move your neck, back, and arms. Identifying movement patterns or muscle imbalances that may contribute to compression is an important part of the evaluation.
Treatment may include targeted stretching, strengthening exercises, posture correction, and education on modifying daily activities. Hands-on techniques such as joint mobilisation, soft tissue therapy, taping, or other supportive methods may also be used where appropriate.
Recovery time varies depending on symptom severity and individual response to treatment. Some people improve within a few sessions, while others may require several weeks of therapy combined with a home exercise program.
Important Note
This information is intended for general education only and should not replace personalised medical advice. Always consult a qualified healthcare professional regarding your specific condition and treatment options.