You are pointing at your shoulder. The problem may be six inches higher.

IS IT YOUR NECK OR YOUR SHOULDER?

The neck and the shoulder refer pain into the same territory, get imaged separately, and are treated by different people. That is why this particular mistake costs patients a year.

Why the confusion is structural, not careless

The C5 and C6 nerve roots supply the deltoid and the lateral arm. The subacromial structures and the acromioclavicular joint refer into almost exactly the same area. A person who points to the outside of their upper arm has told you nothing that separates the two.

It gets worse: both are common past forty, and both are frequently present at once. A systematic review of overlapping cervical and shoulder pathology found masquerading and concurrent disease common enough that finding one does not license you to stop looking.

What actually separates them

• Does moving the neck change it? Rotation and extension provoking the arm pain points at the neck. Reaching, lifting away from the body and lying on it at night point at the shoulder.
• Is there numbness or tingling? Shoulder pathology aches. It does not produce dermatomal numbness or true weakness. Pins and needles in specific fingers is a nerve root.
• Does it wake you when you roll onto it? That is close to a shoulder signature.
• Where does it stop? Shoulder pain rarely travels below the elbow. Radicular pain frequently does.
• Passive versus active range. A shoulder that a clinician can move further than you can move it yourself is a shoulder problem. Restriction in both directions raises a different question.

The tests, and how much they are worth

Spurling’s test — extension, rotation toward the side, gentle compression — is reasonably specific for a cervical root: a positive test is meaningful. It is not sensitive, so a negative one does not clear the neck. A systematic review of physical tests for cervical radiculopathy is blunt about that asymmetry, and it is the reason a normal examination does not end the conversation.

Shoulder testing has the mirror problem. The provocative tests overlap heavily with each other and none is decisive alone. What resolves it is a cluster of findings that agree, and where they do not, a diagnostic injection.

The trap: a scan of the wrong structure

Image a shoulder in anyone over fifty and you will find something. Image a neck and you will find degenerative change at three levels. Both reports will be accurate and neither establishes the source of pain.

The most common failure we see is a shoulder MRI ordered for arm pain, a partial cuff tear reported, and a year of shoulder treatment for a C6 radiculopathy. The reverse happens too. The imaging problem covers why in more detail.

When it is both

In a meaningful share of people it is, and that is not a cop-out — it is a treatment plan. The useful question becomes which one is dominant now, which is answered by treating the dominant one and reassessing rather than by arguing about the scan.

A diagnostic injection settles it faster than another opinion. Anesthetise the subacromial space: if the arm pain goes, the shoulder was driving it. If nothing changes, it was never the shoulder.

The order of treatment when it is both

Roughly a third of the people who come in with this question have findings in both, and the useful move is not to argue about which is primary but to treat the dominant one and reassess at six weeks.

That sounds imprecise and it is actually the most efficient path. The second problem is almost always smaller than it appeared once the first is quiet, and the reassessment costs one appointment rather than a second course of imaging.

Why this particular error costs a year

Because the two structures are owned by different specialties. A shoulder surgeon images a shoulder and finds a shoulder problem, because there is always a shoulder problem to find past fifty. A spine clinic images a neck and finds degenerative change, because there always is.

Neither is being careless. The system is arranged so that whoever you reach first determines which structure gets treated, and the examination that would have settled it takes twenty minutes and is nobody’s job.

What to bring so this gets settled in one visit

The imaging itself rather than the report, and both sets if you have had the neck and the shoulder scanned. What has been tried, for how long, and what happened. And if you have had an injection anywhere, what it was and what it did — a subacromial injection that changed nothing is one of the most useful pieces of information you can arrive with.

Why the metabolic question comes up here too

Both structures are tendon and collagen, and both fail earlier and heal worse in the presence of insulin resistance. Diabetes is among the strongest predictors of cuff disease and of adhesive capsulitis, and the same physiology is working on the cervical structures at the same time. It is the reason two people with the same job and the same age do not get the same result.

What people ask when nobody can tell them which it is

My shoulder MRI showed a tear. Is that the answer?

Not on its own. Rotator cuff abnormalities are extremely common on imaging in people with no symptoms, so a reported tear is a finding rather than a diagnosis. Whether it is your pain source is a clinical question. Shoulder pain that starts in the neck.

Can a neck problem cause shoulder blade pain?

Yes, and it is one of the most common presentations. The lower cervical facet joints refer over the scapula, which is regularly treated as a shoulder or a muscle knot for months. Rotator cuff, or the neck?.

Which should I get imaged first?

Neither, until someone has examined you. The examination determines which imaging is worth doing and how to read it, and ordering both produces two abnormal reports and no clarity. What a compressed root actually causes.

Who should I see?

Someone willing to examine both in the same appointment. That is the entire point of this page. The subacromial bursa.

Related reading

• Rotator cuff, or the neck?
• Subacromial bursa
• AC joint pain
• Cervical radiculopathy
• Why your MRI is normal
• When your hands are the problem