Thoracic Outlet Syndrome
Pain or tingling that runs from the neck and shoulder down through the arm. Fingers that go numb at awkward moments.
A sense of weakness or heaviness in the hand that you cannot quite explain. Thoracic outlet syndrome does not always announce itself clearly, and the symptoms can be easy to attribute to something else entirely. If you have been told it might be this condition, or if it sounds like what you have been experiencing, we can help.
What is going on
The thoracic outlet is a narrow channel at the top of the chest, sitting just below the collarbone and above the first rib. The nerves and blood vessels that supply the arm and hand all pass through this space on their way down from the neck. When something puts pressure on those structures in this passage, the result is thoracic outlet syndrome.
Most people with the condition have what is called the neurogenic type, where it is the nerves that are being compressed. This is by far the most common form and tends to produce tingling, numbness, and sometimes aching or weakness in the arm and hand, particularly when the arm is raised or held in certain positions. Less commonly, it is the blood vessels that are affected. Venous thoracic outlet syndrome involves compression of a vein and can cause swelling, heaviness, or a bluish discolouration in the arm. Arterial thoracic outlet syndrome, where an artery is compressed, is rarer but can affect circulation to the hand. An osteopathic assessment will help establish which structures are involved and where the pressure is coming from.
Why it develops
The causes vary from person to person. One of the more common contributors is tightness in the scalene muscles of the neck or the pectoralis minor at the front of the shoulder. These muscles form part of the boundary of the thoracic outlet, and if they are chronically shortened through posture, repetitive movement, or old injury, they can gradually reduce the available space. Spending long hours at a desk with the head forward and the shoulders rounded is a common pattern associated with this kind of tightness. Some people have an anatomical variation called a cervical rib: an extra rib that develops from the lowest neck vertebra and is present from birth. This occupies space in the thoracic outlet and can make compression more likely, particularly as muscles and soft tissues adapt over time. A previous injury to the neck, shoulder, or collarbone can also be a factor, as can certain overhead-heavy sports or occupations.
How we approach it at BTC
The right starting point is an osteopathic assessment. Thoracic outlet syndrome presents differently in different people, and understanding the specific pattern of compression in your case shapes everything that follows. Your osteopath will assess the neck, shoulder, thoracic spine, and surrounding soft tissues, carry out specific tests to identify which structures are under pressure, and build a clear picture before any treatment begins.
Once the assessment is complete, hands-on osteopathic treatment can make a real difference. The focus is typically on releasing tension in the muscles of the neck, chest wall, and shoulder, restoring movement in the relevant joints, and taking the load off the compressed structures. Postural guidance and exercises will usually be part of your plan too, since how you hold and move your body day to day plays a significant role in how quickly things improve and whether they stay improved.
Is it thoracic outlet syndrome, or could it be carpal tunnel?
These two conditions are frequently confused, and it is easy to understand why. Both can cause tingling and numbness in the hand and fingers, and from the patient's side the symptoms can feel similar. The distinction lies in where the compression is happening. With carpal tunnel syndrome, the median nerve is compressed at the wrist. With thoracic outlet syndrome, the issue is higher up, at the neck and shoulder, and the symptoms tend to spread across more of the arm rather than concentrating in the thumb, index, and middle fingers.
It is not uncommon for someone to receive a carpal tunnel diagnosis when the real source of compression is actually in the thoracic outlet, especially if symptoms began after a change in posture, a neck or shoulder injury, or a prolonged period of overhead activity. An osteopathic assessment will trace the compression to its actual origin rather than treating the most obvious location.
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You do not need a confirmed diagnosis to come in
If you have symptoms that make you think this could be thoracic outlet syndrome, that is enough reason to book. You do not need a confirmed diagnosis, a scan, or a GP referral. Our osteopaths will take a full history, assess what is happening, and work out what is driving the problem. If it turns out to be something different, that is still something we can look at. What matters is that something is not right, and that is where we start.
Questions people ask us
How will the osteopath work out where the compression is coming from?
Your osteopath will take a thorough case history and then carry out a detailed physical assessment, looking at movement in the neck, shoulder, and upper back, and performing specific orthopaedic and neurological tests to help locate the source of pressure. This is what shapes the treatment plan, so we take the time to get it right.
Could the problem be in my neck rather than the thoracic outlet?
Quite possibly, and in some cases both areas are contributing at the same time. The nerves that supply the arm originate in the cervical spine, and compression at neck level can produce symptoms that look almost identical to thoracic outlet syndrome. Your osteopath will assess the full picture from the outset rather than assuming where the problem is before examining you.
Will I need physiotherapy instead of osteopathy?
Osteopathy and physiotherapy overlap significantly in this area, and both take a hands-on, movement-based approach. Our osteopaths are well-placed to assess and treat thoracic outlet syndrome. If they felt a different referral was appropriate for your specific situation, they would tell you.
Can thoracic outlet syndrome be fully resolved, or is it something I will always have to manage?
This depends on what is causing the compression. Where tight muscles and postural habits are the primary drivers, meaningful and lasting improvement is very achievable with the right treatment and some attention to how you use your body day to day. Where there is a structural factor such as a cervical rib, the focus may be more on managing the condition effectively and keeping symptoms well under control. Your osteopath will give you a clear picture of what to expect once they have assessed you.
Related Conditions
Carpal tunnel syndrome: the symptoms of these two conditions overlap closely, and thoracic outlet syndrome is sometimes misdiagnosed as carpal tunnel before the compression is traced to its real source higher up .
Still Not Sure?
If you're in pain and wondering whether we can help, that's exactly why we're here. You don't need to know what the problem is. You don't need a referral. You just need to take the first step. Book online today or call 020 7733 9944 to speak to us.