Blog, Physiotherapy

Thoracic Outlet Syndrome: A Physiotherapist’s Perspective

Man experiencing upper body discomfort as physiotherapist explains Thoracic Outlet Syndrome with spine model.

Thoracic Outlet Syndrome can be a frustrating and often misunderstood condition; causing pain, numbness, or tingling in the neck, shoulder, and arm.

Hello, my name is Douglas and I’m a senior physiotherapist at M Physio. One of the most important aspects of my role is not only alleviating pain but also helping patients recognise early signs of conditions like Thoracic Outlet Syndrome (TOS).

This condition stems from compression of nerves or blood vessels in the thoracic outlet – the narrow space between your collarbone and first rib.

What Is Thoracic Outlet Syndrome?

TOS is an umbrella term that includes three main types:

Neurogenic TOS (nTOS): Compression of the brachial plexus, accounting for the majority of cases.
Venous TOS (vTOS): Involving the subclavian vein, often linked to swelling and circulation issues.
Arterial TOS (aTOS): The rarest form, involving compression of the subclavian artery.

It typically affects adults between the ages of 20–50, with women more commonly affected than men.

Common (but often overlooked) Symptoms

While arm pain and numbness are common indicators of TOS, there are several lesser-known symptoms that patients may not initially associate with the condition:

Cold or pale fingers/hand – Reduced arterial blood flow can cause temperature and colour changes in the hand.
A sense of arm heaviness or fatigue – Especially during or after overhead activities.
Swelling or fullness in the arm – May indicate a vascular form of TOS, often mistaken for a soft tissue issue.
Visible colour changes with arm movements – Such as blanching or bluish discolouration when lifting the arm.
Difficulty gripping or weakness in the hand – Especially affecting the pinky and ring fingers due to nerve compression.

Other signs include neck tightness, scapular pain, and pins and needles in the upper limb.

The Physiotherapy Assessment Process

Physiotherapy plays a key role in identifying the type and source of compression.

Our assessment process usually includes:

History Taking: Understanding symptom patterns, occupational or sporting demands, and postural stressors.
Physical Examination: Postural analysis, palpation, strength and sensory testing, and positional tests such as Adson’s and Roos tests.
Neurovascular Screening: Checking reflexes, skin temperature, capillary refill, and any muscle wasting.
Functional Assessment: Observing movement and biomechanics during typical activities such as lifting, working at a desk, or sleeping.

Depending on the findings, referral for imaging such as ultrasound, MRI, or nerve conduction studies may be warranted.

How Physiotherapy Can Help

Treatment is typically conservative, especially for neurogenic TOS.

With the right approach, most patients experience meaningful improvements within a few weeks to months.

Physiotherapy goals include reducing compression, improving postural alignment, and restoring nerve mobility.

Two Effective Exercises to Alleviate TOS Symptoms

Scapular Retraction Rows

Using a resistance band, pull both arms back while squeezing the shoulder blades together. This promotes postural correction and stabilizes the shoulder girdle.

2–3 sets of 10–15 reps
Focus on slow, controlled movement

Doorway Pec Stretch

Stand in a doorway with your forearm on the doorframe at 90 degrees. Gently lean forward to stretch the front of your shoulder and chest.

Hold for 30 seconds
Repeat 3–4 times daily

Additional techniques such as neural gliding (nerve flossing), deep neck flexor strengthening, and diaphragmatic breathing can also significantly relieve symptoms.

What If Conservative Care Isn’t Enough?

In some cases, especially venous or arterial TOS, or when symptoms persist beyond six months of treatment, further interventions may be considered.

This can include:

Medical referral for medication or injections
Surgical decompression, such as first-rib resection or scalenectomy
Post-surgical rehabilitation, where physiotherapy is essential for recovery and return to function

Why Early Detection and Treatment Matter

Untreated TOS can lead to chronic nerve damage, muscle weakness, or vascular complications like blood clots or arterial insufficiency.

The earlier we identify and treat TOS, the better the outcomes.

Patients who begin physiotherapy early often report significant relief in 4–6 weeks, with progressive gains over several months.

Final Thoughts

Thoracic Outlet Syndrome can be confusing and easily misdiagnosed, but a skilled physiotherapist can help uncover the underlying causes and provide structured, evidence-informed care.

If you’ve been dealing with unexplained arm tingling, neck tension, or hand weakness, don’t ignore it. It might be more than just a muscle strain.

With the right assessment, education, and rehabilitation plan, you can take control of your symptoms and return to the activities you love.

Written By:

Douglas Woo (Senior Physiotherapist)

Doctor of Physiotherapy

References

Jones MR, Prabhakar A, Viswanath O, et al. “Thoracic Outlet Syndrome: A Comprehensive Review.” Pain Ther. 2019.

Sanders RJ, Hammond SL, Rao NM. “Thoracic Outlet Syndrome: A Review.” J Shoulder Elbow Surg. 2022.

Povlsen B, Hansson T, Povlsen SD. “Treatment for thoracic outlet syndrome.” Cochrane Database Syst Rev. 2014.

Peek J, Vos CG, Ünlü Ç, et al. “Surgical Treatment for Thoracic Outlet Syndrome.” Eur J Vasc Endovasc Surg. 2017.

Atasoy E. “Thoracic Outlet Syndrome: Anatomy.” Hand Clin. 2004.

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