Top-of-shoulder pain

What it is

The acromioclavicular joint is a small joint on top of the shoulder where the outer end of the collarbone meets the shoulder blade. It has a small cartilage disc and it takes load with every overhead and across-body movement.

It degenerates with age and with load, and it is commonly injured in a fall onto the point of the shoulder - a shoulder separation. Both produce the same characteristic picture: pain that can be pointed to with one finger, worst with cross-body reaching and heavy pressing.

What it feels like

• Pain on the very top of the shoulder, pointable with one finger
• Worst reaching across the body, and with heavy pressing or dips
• Sore lying on that shoulder at night
• Sometimes a visible bump where the collarbone ends
• Aching after overhead work rather than during it

What causes it

Most people have more than one of these at once, and they feed each other. Read the list looking for the two or three that sound like your week rather than for the one true answer — the ones that describe you are the ones worth acting on.

Degeneration of the joint

The small cartilage disc within the joint wears with age and load. Degenerative change here is very common on imaging in people over forty and is often symptomless.

A previous shoulder separation

A fall onto the point of the shoulder damages the ligaments and alters the joint's mechanics permanently, producing degeneration and pain years later.

Heavy pressing and dips

Bench press, dips and overhead press all load this joint substantially. It is one of the most common sources of shoulder pain in weightlifters.

Cross-body movements

Bringing the arm across the body compresses the joint directly. This is why it is the specific movement that reproduces the pain and a useful diagnostic feature.

Repetitive overhead work

Painting, plastering, throwing and overhead occupational work all load the joint repeatedly.

Carrying loads on the shoulder

A bag strap or a load resting directly over the joint compresses it for long periods.

Distal clavicular osteolysis

In weightlifters, repeated heavy loading can cause the end of the collarbone to resorb, producing persistent pain. It is a recognised and specific entity in this population.

Coexisting rotator cuff problems

The joint sits directly above the cuff and problems in both frequently coexist, which can make the pain source difficult to identify without careful examination.

Continuing to press through it

Because the joint is small and the pain is localised, lifters often work around it rather than modifying, which allows the irritation to persist indefinitely.

Who tends to get it

• Weightlifters, particularly those doing heavy bench press and dips
• Anyone who has had a fall onto the point of the shoulder
• People in overhead occupations
• Adults over forty, in whom degenerative change is common
• Anyone who carries loads directly on the shoulder

What makes it worse, and what settles it

The qFIT routine for this

Ready-made routineShoulder Relief & Overhead Range

qFIT already has this one built. It runs massage first, then stretching, then strength — the order that works on a body that is already sore — and every activity in it carries the reason it is there.

The button below opens your Checklist with this routine already selected, so instead of your whole list you land on just its Categories, Targets and Exercises, each with its checkbox, ready to tick as you work through them.

Have more than one problem? Tick yours under My Problems on My Profile and your Checklist's Routine list gains Recommended for my problems — every routine for the problems you picked, merged into one. Your picks stay private; that filter is the only thing they feed.

Get it checked if…

A step deformity after a fall onto the shoulder is an AC separation - assess before loading

And whatever the body part: chest pain or unusual breathlessness on exertion; a fever alongside the pain; unexplained weight loss; pain that is constant and unrelated to how you move; new numbness, weakness or loss of bladder or bowel control; or one calf that is swollen, warm and painful. Any of those, stop and get assessed.

How it usually goes

Load modification plus shoulder girdle strengthening settles most cases over six to twelve weeks. Injection into the joint is effective where symptoms persist, and surgical excision of the end of the collarbone is a reliable procedure for the minority who do not respond - it is one of the more predictable shoulder operations. Distal clavicular osteolysis in a lifter needs a genuine period of load reduction rather than working around it.

Prevalence basis: Shoulder imaging cohorts

Others the same routine covers

These share the Shoulder Relief & Overhead Range routine, so the work is the same. If one of them also sounds like you, that is a reason to expect more from it, not less.

This is general information, not a diagnosis, and it cannot examine you. If it matches you, use it to ask better questions of a clinician rather than to replace one.