Thoracic Outlet Syndrome
Pain and weakness in the neck, shoulder, arm and hand
Thoracic Outlet Syndrome
Pain and Weakness in the Neck, Shoulder, Arm, and Hand
Thoracic Outlet Syndrome (TOS) is a condition caused by compression of nerves or blood vessels in the thoracic outlet — the narrow space between the collarbone and first rib. This compression can affect the nerves, arteries, or veins traveling from the neck into the shoulder and arm, leading to pain, weakness, numbness, and circulation problems.
Thoracic Outlet Syndrome can interfere with daily activities, work performance, and overall mobility, especially when symptoms become chronic or progressive.
Types of Thoracic Outlet Syndrome
Neurogenic TOS
The most common form of TOS, caused by compression of the brachial plexus nerves. Symptoms may include:
- Neck and shoulder pain
- Arm or hand numbness
- Tingling sensations
- Muscle weakness
- Reduced grip strength
- Fatigue with arm movement
Venous TOS
Occurs when veins are compressed, affecting blood flow from the arm. Symptoms may include:
- Arm swelling
- Heaviness
- Bluish skin discoloration
- Pain or tightness
- Enlarged veins near the shoulder or chest
Arterial TOS
A less common but serious condition involving compression of arteries. Symptoms may include:
- Cold sensitivity
- Weak pulse
- Hand discoloration
- Pain with activity
- Reduced circulation to the arm or hand
Common Symptoms of Thoracic Outlet Syndrome
Symptoms vary depending on the structures being compressed.
- Neck pain
- Shoulder pain
- Arm weakness
- Hand numbness or tingling
- Reduced grip strength
- Pain with overhead activity
- Muscle fatigue
- Swelling or circulation changes
- Headaches or upper back discomfort
Symptoms may worsen with repetitive movements, lifting, or prolonged arm positioning.
Common Causes of Thoracic Outlet Syndrome
Thoracic Outlet Syndrome may result from:
- Traumatic injuries
- Auto accidents
- Poor posture
- Repetitive overhead motions
- Heavy lifting
- Anatomical abnormalities
- Sports-related strain
- Muscle enlargement or tightness
Certain occupations and athletic activities may increase the risk of developing TOS.
Diagnosis and Evaluation
Because symptoms can mimic other neurological or orthopedic conditions, a thorough evaluation is important. Diagnostic Testing May Include:
- Physical and neurological examinations
- MRI or CT imaging
- Ultrasound studies
- EMG and nerve conduction studies
Treatment Options
Common Treatment Approaches Include:
- Physical therapy
- Postural correction
- Stretching and strengthening exercises
- Medication management
- Pain management procedures
Importance of Early Treatment
Without treatment, Thoracic Outlet Syndrome may lead to worsening pain, nerve damage, or circulation problems. Early intervention may help:
- Reduce nerve and vascular compression
- Improve strength and mobility
- Restore circulation
- Prevent long-term complications
- Improve quality of life
Specialized Care for Thoracic Outlet Syndrome
Managing Thoracic Outlet Syndrome often requires a multidisciplinary approach focused on relieving compression, improving posture and mobility, and restoring nerve and vascular function. Personalized treatment plans help patients return to daily activities with reduced pain and improved function.