The Physio Hub

Thoracic Outlet Syndrome: What It Is and How Physiotherapy Can Help

At The Physio Hub in Collingwood, ON, we’re committed to helping people move better and feel stronger. Whether you’re recovering from a sports injury, managing a chronic condition, or navigating nerve-related symptoms, our goal is to guide you back to confident, pain-free movement.

One condition that can affect both athletes and desk workers alike is Thoracic Outlet Syndrome (TOS)—a complex and often misunderstood source of pain, numbness, or weakness in the upper body. But with the right treatment plan, TOS can be managed without surgery, and often significantly improved through physiotherapy.


What Is Thoracic Outlet Syndrome?

Thoracic Outlet Syndrome occurs when the nerves or blood vessels are compressed in the narrow space between your collarbone and first rib (called the thoracic outlet). This compression can cause:

  • Numbness or tingling in the arms and fingers
  • Pain in the neck, shoulders, or arm
  • Weakness or fatigue in the upper limbs
  • A feeling of heaviness in the arms with activity

What Is the Most Common Type of TOS?

There are three types of Thoracic Outlet Syndrome:

  1. Neurogenic TOS (most common – over 90% of cases): Compression of the brachial plexus, the nerve bundle that travels from your neck to your arm.
  2. Venous TOS: Compression of the subclavian vein, which can cause swelling, heaviness, and a bluish color in the arm.
  3. Arterial TOS: Compression of the subclavian artery—this is the rarest and most serious type.

Because neurogenic TOS is by far the most common, most treatment plans focus on relieving pressure on the nerves and restoring optimal posture, strength, and mobility.


How Do You Treat Thoracic Outlet Syndrome?

The good news? Most cases of TOS can be managed effectively with physiotherapy. At The Physio Hub, our approach to TOS is hands-on, movement-based, and tailored to your individual needs.

Your treatment plan might include:

  • Postural correction: Poor posture—especially forward head and rounded shoulders—can narrow the thoracic outlet. We work on correcting this with targeted strengthening and alignment work.
  • Manual therapy: Gentle hands-on techniques to release tight muscles like the scalenes or pectoralis minor that may be contributing to compression.
  • Stretching and mobility work: To open up the chest, improve neck and shoulder movement, and reduce strain on nerves and vessels.
  • Nerve gliding exercises: To restore normal mobility and reduce sensitivity in compressed nerves.
  • Education and ergonomics: We help you modify your work or sport environment to reduce strain on the thoracic outlet over time.

Our goal is to not just reduce symptoms, but to restore full, functional movement so you can get back to the activities you love.


How to Decompress a Thoracic Outlet

Decompressing the thoracic outlet means making more space for the nerves and vessels to move freely. At The Physio Hub, we focus on strategies that include:

  • Shoulder blade positioning: Teaching your shoulder blades to move and stabilize properly can significantly reduce pressure in the outlet.
  • Strengthening the postural muscles: Muscles like the mid-back, core, and deep neck flexors help hold your body in an open, decompressed posture.
  • Neural mobility drills: These “nerve flossing” exercises help the nerves glide smoothly through the thoracic outlet.
  • Lifestyle changes: Simple things like adjusting your desk, backpack, or sleeping position can also help reduce daily strain.

What Are the Red Flags for Thoracic Outlet Syndrome?

While most TOS cases are treatable and not dangerous, certain symptoms should prompt immediate medical attention:

  • Sudden or severe swelling in the arm or hand
  • A cold, pale, or bluish hand
  • Loss of pulse in the arm
  • Significant weakness or inability to lift the arm
  • Blood clots or signs of vascular compromise

These may be signs of venous or arterial TOS, which are less common but more serious. Always consult your healthcare provider if you experience these symptoms.


Move Better, Feel Better

At The Physio Hub, we’re strong believers in movement over restriction. Thoracic Outlet Syndrome can feel overwhelming, but you don’t have to deal with it alone—and you definitely don’t need to stop moving. With expert guidance and a personalized plan, you can regain strength, mobility, and control.


Think you may be dealing with TOS?
Book an appointment at The Physio Hub in Collingwood, ON. Let’s get to the root of your symptoms and create a plan that helps you move forward—with confidence.