Thoracic Outlet Syndrome: Understanding It and What May Help

Some arm symptoms refuse to fit into a firm categorisation. The hand tingles but not in the neat diagnostic finger patterns of carpal or cubital tunnel. The arm aches and feels heavy but the shoulder examines normally. Symptoms flare when working overhead, painting a ceiling, swimming, hanging washing or when carrying a heavy bag on that side and settle when the arm comes down. When those symptoms present, thoracic outlet syndrome joins the list of suspects. It is a diagnosis worth explaining carefully, partly because it is underrecognised and partly because it can be controversial: the medical literature calls it one of the most contested labels in musculoskeletal care.

This page explains what the thoracic outlet syndrome is, the three quite different problems that share the name, the warning signs that need a doctor promptly and what a chiropractic approach to the common form of the condition is.

“Leslie was so welcoming, kind and wanted to make sure I knew everything”

“Leslie was so welcoming, kind and wanted to make sure I knew everything he was about to do before making any adjustments. I am happy to say that after my first appointment he had already made a huge difference and the issue resolved very quickly after that appointment.. I am fully back up and running now.
I would 100% recommend going to see Leslie at Bournemouth Chiropractic as I don’t think you will regret it.”

Adam R

What is thoracic outlet syndrome?

The thoracic outlet is the crowded corridor between your neck and armpit. It is through this corridor that the nerves of the arm (the brachial plexus) and the main artery and vein all travel, squeezing between the scalene muscles of the neck then under the collarbone then beneath the chest’s pectoralis minor muscle.[4] Thoracic outlet syndrome means one or more of those structures is being compressed somewhere along that corridor. The name covers three distinct problems.

Neurogenic TOS: compression of the nerves and this accounts for the vast majority of cases and produces pain, tingling, heaviness and weakness in the arm.[2]

Venous and arterial TOS: compression of the vein or artery. This is rarer but more urgent and presents differently with swelling and discolouration or a cold, pale hand. This type needs a doctors attention.

Knowing which type it is is the first and most important diagnostic task because the rare vascular forms need a doctor and not a chiropractor.

what causes it

Anything that narrows an already snug corridor. Some people are built with less room: around one in a hundred has an extra small rib at the base of the neck (a cervical rib) and tight or extra bands of muscle and fibrous tissue are common anatomical variations.[3] On top of that, life adds its pressures. A whiplash injury or a fall can leave the scalene muscles guarded and thickened. Long hours of forward-head, rounded-shoulder posture narrow the space under the collarbone. Repetitive overhead work and sport, decorating, swimming, throwing, weight training can load the corridor thousands of times over. Heavy carrying drags the shoulder girdle down onto the structures beneath. Often it is a combination: a tight corridor genetically, plus a posture or occupation that pressurises a little further, plus perhaps one provoking action or activity such as a bout of overhead work that tips the condition into symptoms.

Explore our shoulder and arm guides

Shoulder and arm pain: the main guide

Shoulder

Elbow, wrist and hand

When arm pain starts in the neck or shoulder girdle

Arm pain: is it your neck or your shoulder?
Referred arm pain from the neck and brachial neuralgia
Thoracic outlet syndrome (you are here)

Related guides

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Bones and joints

Symptoms of thoracic outlet syndrome

The neurogenic form of thoracic outlet syndrome, the most common one, typically produces an aching, heavy and easily fatigued arm with pins and needles that often favour the little finger side of the hand and forearm, symptoms provoked by overhead activity, carrying or sustained postures and eased by bringing the arm down.[2][4] It can masquerade convincingly as other shoulder and arm problems and part of diagnosing it is ruling those conditions out: a trapped nerve in the neck usually changes with head position and follows a single nerve’s territory; carpal and cubital tunnel syndromes pick out precise finger patterns and peak at night rather than overhead. The vascular forms are different: a suddenly swollen, congested, bluish arm suggests the vein; a cold, pale, easily-tired hand with cramping suggests the artery and need medical attention. Those vascular and arterial patterns are exactly what the red flags below are about.

How I can help

Thoracic outlet syndrome is a contested diagnosis with no unilaterally agreed test and the Cochrane review of its treatments found the rigorous trial evidence to be thin for every option, surgical and non-surgical alike.[1] That is not a reason to dismiss your symptoms; it is a reason to approach them methodically.

Clinical reviews consistently position conservative care, posture and movement retraining, easing the muscles that crowd the corridor, graded activity changes as the sensible first line for the neurogenic form, with surgery reserved for vascular cases and for neurogenic cases that fail a proper conservative trial.[2][3]

My chiropractic approach reflects that research. My first job is the sorting between the two and diagnosing correctly: a careful history and examination of your neck, shoulder and arm, screening the nerve tunnels and checking for any vascular features.[4]

Where the picture fits neurogenic TOS care centres on making room: gentle hands-on work for the scalenes, pectoral muscles, neck and upper back symptoms that accompany the problem, mobilising the first rib and shoulder girdle and retraining the postures and loading habits that close the corridor, including the specific overhead or carrying pattern that provokes yours. Progress is judged over weeks against your symptoms and I set expectations: many people improve steadily as space and habits change and if yours does not or any vascular features appear, I will say so and support referral to your GP or a vascular specialist without delay.

If you have been diagnosed with thoracic outlet syndrome and it is getting in the way of things you would rather be doing, come and talk it through. I offer a free 15-minute consultation, you can come in for a short no-obligation chat with no examination or treatment.

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red flags

Most thoracic outlet symptoms are neurogenic and safe to assess and manage. The vascular presentations are the exception and need prompt medical attention. It is my job to differentiate between the two.

Seek urgent medical care if your arm becomes swollen, congested and blue or dusky in colour, which can signal compression or clotting of the vein or if the hand becomes cold, pale or painful with exertion or fingertips become suddenly discoloured, which can signal the artery. See your GP promptly if hand muscles are visibly wasting or weakness is progressing, if symptoms involve both arms with clumsiness or balance changes or if you have unexplained weight loss, night sweats or a history of cancer alongside new arm symptoms. And any arm pain arriving with chest tightness, breathlessness or sweating is a 999 call.

Everything else, the aching, tingling, overhead-provoked arm, is safe to start with a chiropractic examination.

your first visit to Bournemouth Chiropractic

Your first appointment starts with your full medical history and how your condition is presenting: what the arm does, when, with which activities and what your work and sport demand of it. The examination works through your neck, shoulder, first rib and the nerve tunnels of the arm. I use positional tests that load the thoracic outlet and checks the features that would point to the vein, the artery or a different diagnosis altogether.

You leave with an explanation of what fits and what has been ruled out and an agreed plan. There is more detail about what exactly happens on your first visit to see me at Bournemouth Chiropractic on the blog.

Frequently Asked Questions

Can a chiropractor help with thoracic outlet syndrome?

For the common neurogenic form of thoracic outlet syndrome, conservative care addressing posture, the crowding muscles and loading habits is the recognised first line and that is the care I provide alongside honest reassessment.[2][3] The rare vascular forms belong with a doctor and a large part of my job is recognising them and referring promptly.

How do I know it isn’t a trapped nerve in my neck or is it carpal tunnel?

Often you can’t be sure without examination if it is a trapped nerve or carpel tunnel because the symptoms can overlap. Broad clues: neck-origin symptoms shift with head position; carpal and cubital tunnel pick precise finger patterns and peak at night; thoracic outlet symptoms favour overhead activity and carrying, with a heavy, easily-tired arm. Sorting these is precisely what the chiropractic assessment and examination does.

Do I need a scan to diagnose thoracic outlet syndrome?

Usually not first. There is no single definitive test and diagnosis rests on the pattern, the examination and the exclusion of mimics.[1][4] Imaging earns its place to check for a cervical rib, to investigate vascular features or when surgery is being considered. If your case warrants it, I will say so.

Will I need surgery for thoracic outlet syndrome?

For neurogenic TOS surgery is a last resort after a trial of conservative care and the trial evidence for it is limited.[1][2] Vascular TOS is different: vein and artery compression often do need surgical treatment, which is why recognising those forms early matters so much and referral to your doctor is important.

How long does thoracic outlet syndrome take to improve?

With the neurogenic form of thoracic outlet syndrome expect gradual change over weeks to a few months as posture, muscle tone and loading habits shift. Clinical reviews typically describe conservative trials of at least four to six weeks before judging.[2] Improvement is usually a more gradual and stalled progress is a signal to reassess, not to push harder. We will constantly review progress.

Whatever might be behind your thoracic outlet symptoms, come and find out

Arm tingling, heaviness or fatigue that doesn't fit the usual patterns can sometimes be described as thoracic outlet syndrome. Although it's a diagnosis surrounded by uncertainty, it is important to rule out more serious causes first. A proper assessment is the right starting point, so I'd happily see you to find out what's going on. During your consultation I'll give you an honest opinion, flagging urgently if I see anything that needs medical attention.

It's a less common presentation than straightforward shoulder or nerve complaints and that's exactly why getting the assessment right matters

Where your symptoms are connected to posture, your neck or shoulder girdle mechanics, chiropractic care alongside that can be a well-tolerated option worth considering and I'll explain clearly what I think may help in your particular case. If I see anything suggesting this needs more urgent or specialist attention, I'll help point you in the right direction.

Call or message me, whatever's easiest and we'll take it from there.

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References

[1] Povlsen B, Hansson T, Povlsen SD. Treatment for thoracic outlet syndrome. Cochrane Database Syst Rev. 2014;(11):CD007218. https://doi.org/10.1002/14651858.CD007218.pub3

[2] Li N, Dierks G, Vervaeke HE, et al. Thoracic outlet syndrome: a narrative review. J Clin Med. 2021;10(5):962. https://doi.org/10.3390/jcm10050962

[3] Jones MR, Prabhakar A, Viswanath O, et al. Thoracic outlet syndrome: a comprehensive review of pathophysiology, diagnosis, and treatment. Pain Ther. 2019;8(1):5-18. https://doi.org/10.1007/s40122-019-0124-2

[4] Hooper TL, Denton J, McGalliard MK, Brismée JM, Sizer PS Jr. Thoracic outlet syndrome: a controversial clinical condition. Part 1: anatomy, and clinical examination/diagnosis. J Man Manip Ther. 2010;18(2):74-83. https://doi.org/10.1179/106698110X12640740712734

Medical Disclaimer

The information on this website is for general informational purposes only and does not constitute medical advice, nor is it a substitute for diagnosis, treatment, or guidance from a qualified healthcare practitioner. If you have any health concern, please consult your GP or another appropriately qualified clinician. Chiropractic treatment isn’t suitable for everyone. Suitability is assessed at your initial consultation, with referral to another healthcare professional made where appropriate. Treatment outcomes vary between individuals, and no guarantee of results is made or implied.

Practitioner: Leslie Budzynski D.C. | Doctor of Chiropractic | GCC registration: 00043 | BCA membership number: 0072