Rotator Cuff Tear: Symptoms, Tests and How a Shoulder Ultrasound Diagnoses It
Learn how a torn rotator cuff feels, which tendon may be involved, how ultrasound confirms it, and the treatment pathways available.
Imagine a few weeks of not being able to sleep on one side, or a shoulder that objects to lifting the kettle.
It’s cause enough to worry, or go down the research rabbit hole of “causes of shoulder pain”.
These usually happen when there is a tear or a split in one of the four tendons that hold your shoulder steady.
But a shoulder tear isn’t anyone’s first guess.
So- we’re here with all the research on what a rotator cuff injury is like, what a tear could mean and how a shoulder ultrasound can detect it.
What is a Rotator Cuff Tear?
A rotator cuff tear is a split in one of the four tendons that hold your shoulder steady, most often the supraspinatus.
It causes pain when lifting your arm, pain at night, and weakness. A shoulder ultrasound scan shows whether the tendon is torn, how far through it goes, and what else is going on around it.
What does a torn rotator cuff feel like?
The pain from a torn rotator cuff turns up in one or two movements first, and then in everyday actions, such as:
Pain in a band as you lift
Your arm feels fine hanging down, starts hurting somewhere around shoulder height, then eases off once it is straight up. Getting a coat on, reaching a high shelf and washing your hair all sit right inside that band.
Pain at night
This is the most common concern that most people booking our shoulder scan have. The pain from a rotator cuff tear can make lying on that side impossible.
Shoulder weakness, which is not the same as pain
Pain makes you not want to lift your arm. Weakness means you try and it does not go, or it drops when somebody lets go of it.
An ache down the outside of your upper arm
Rotator cuff pain seldom stays on the shoulder itself. It usually spreads into the muscle on the outer arm and stops somewhere above the elbow.
Especially if you have pain that carries on past your elbow, with pins and needles or numbness- make sure to mention it when booking an appointment or to your sonographer when they’re assessing you.
What is a rotator cuff tear, and which tendon is it?
Your rotator cuff is four muscles and their tendons, wrapped around the top of your arm bone.
Every time you reach for something, they hold the ball of your shoulder centred in its socket so the bigger muscles have something steady to pull against.
The supraspinatus starts the movement of raising your arm, and it runs through the tightest space of the four, under a bony shelf called the acromion.
That is why it tears more often than the others. Infraspinatus and teres minor turn your arm outwards, and subscapularis turns it in.
The type of tear matters too, in this case.
Partial-thickness tear
Some fibres have gone and some are still holding.
Full-thickness tear
The tear goes all the way through, from one surface of the tendon to the other.
Most tears build up quietly across years and then give way during something completely ordinary. Lifting a bag into an overhead locker is a classic. Others happen in a single moment after a fall or a heavy lift, and those are worth getting looked at quickly rather than waiting them out.
How is a rotator cuff tear diagnosed?
Diagnosis for a rotator cuff tear usually happens in two stages. The first stage is where a GP examines your shoulder to work out how likely a tear is and which tendon is involved. The second stage is when a shorter ultrasound scan is done to fill in the details.
Before the ultrasound scan, some mobility testing such as the drop test, empty can test and external rotation tests are done to have your arm moved around and to be pushed against resistance- to weigh out the extent of injury.
How is an ultrasound used to diagnose a rotator cuff tear?
A shoulder ultrasound is used to diagnose a rotator cuff tear because the probe used in it goes directly over each tendon and puts a live picture of it on the screen next to you.
Healthy tendon fibres have a neat, orderly pattern. A break in that pattern, or a fluid-filled gap where fibres should be, shows up clearly.
Your scan takes about 20 to 30 minutes per shoulder. The sonographer works through the supraspinatus in two directions, then the infraspinatus, teres minor and subscapularis, the bursa sitting above them, the biceps tendon at the front, and the small joint on top of your shoulder.
You will also be asked to lift, lower and rotate your arm while the probe stays on the tendon. Watching your shoulder actually working is how catching and pinching get spotted, and how a tear that only opens under load gives itself away.
What are the other causes of shoulder pain?
Torn rotator cuff is only one of the causes of shoulder pain. There are other causes, such as a frozen shoulder, a calcium deposit in the tendon, or a trapped nerve in your neck, which can have similar symptoms. Here’s a quick breakdown of what each pain feels like and how it’s usually confirmed to help understand it better:
| What it could be | What it tends to feel like | How it is usually confirmed |
|---|---|---|
| Rotator cuff tendinopathy or tear | Pain when lifting the arm, night pain, and noticeable weakness | Ultrasound |
| Bursitis and impingement | A painful arc when moving the arm, especially reaching overhead | Ultrasound, often watched during movement |
| Calcific tendinopathy | Sudden, severe pain with very limited movement, often without a clear injury | Ultrasound (finds and measures the calcium deposit) |
| Biceps tendon problems | Pain at the front of the shoulder, sometimes with a snapping or clicking feeling | Ultrasound |
| Wear in the joint on top of the shoulder (AC joint arthritis) | Pain you can point to with one finger, worse when reaching across your body | Ultrasound; X-ray if bone detail is needed |
| Frozen shoulder (adhesive capsulitis) | Stiffness in every direction, even when someone else tries to move your arm | Clinical examination, with a scan to rule out other causes |
| Referred pain from your neck (cervical radiculopathy) | Pain that travels past the elbow, with pins and needles or numbness | Clinical examination and neck imaging (arranged separately) |
| Labral or SLAP injury | Catching, clicking, or a feeling that the shoulder slips out of place | MR arthrogram (arranged by a shoulder specialist) |
Can a torn rotator cuff heal on its own?
Here’s the honest truth: once a rotator cuff tendon has torn all the way through, it doesn’t knit back together on its own. The blood supply is weakest right where these tears tend to happen, and the muscle behind the tendon keeps pulling the two edges apart, so they can’t meet and heal.
But—and this is important—your pain and your day-to-day function are a different story. Many people feel much better over time, even with a known tear.
That’s because the rest of the shoulder muscles learn to compensate, and with the right exercises and activity tweaks, you can often get back to doing what matters to you.
The tear itself, though, tends to behave differently. Over months and years, it can slowly get bigger, and the muscle can start to weaken and accumulate fatty changes.
A 2024 systematic review looking at how rotator cuff tears progress over time found that partial-thickness tears often evolve into full-thickness tears, and smaller full-thickness tears tend to enlarge—especially when there’s ongoing pain with movement.
This matters because a muscle that’s been slack and underused for years becomes a weaker “engine.” If you decide on surgery much later, the tendon is being reattached to a muscle that’s not as strong as it once was, which can affect outcomes.
What is the treatment pathway for a rotator cuff tear?
Most rotator cuff problems don’t need surgery. UK guidelines from the British Elbow and Shoulder Society (BESS) recommend starting with conservative treatments like physiotherapy and activity modification.
Physiotherapy
Physiotherapy is the first-line treatment for rotator cuff problems. A physiotherapist who knows which tendon is damaged and how badly can design exercises that target the right areas from day one.
Research shows that structured exercise therapy works well for rotator cuff-related shoulder pain and impingement. Many patients do just as well with physio alone as they would with surgery after a year.
Injections
An ultrasound-guided steroid injection places medication precisely into the bursa around the tendon. This can calm inflammation enough to make physiotherapy more comfortable and effective.
Here’s what the evidence says: steroid injections give short-term pain relief, usually lasting 6 to 12 weeks. They don’t change the long-term outcome of the tear, and having repeat injections doesn’t add any benefit over a single one.
Surgery
Surgery may be an option if your symptoms haven’t improved after 6 months of good conservative treatment. This decision should be made with a shoulder surgeon who can review your scan and discuss whether repair makes sense for your specific case.
For full-thickness tears that cause significant weakness or don’t respond to months of proper conservative care, surgical repair might be discussed. But for many people, especially those with partial tears or age-related changes, non-surgical management remains the preferred approach.
When to seek urgent medical attention
We’d also recommend getting urgent medical attention if you have sudden or severe shoulder pain, you cannot move your arm at all, or the pain started right after an injury like a fall. These could signal a more serious problem that needs prompt assessment.
Book a private shoulder ultrasound with London Private Ultrasound
Let’s be honest—most people book with us because they’re tired of waiting. Maybe your GP mentioned a scan weeks ago, and you’re still on the list.
Maybe your shoulder pain is stopping you from sleeping, working, or doing the things you love, and you just want to know what’s going on. Either way, we get it: the waiting often feels worse than the scan itself.
That’s why patients choose London Private Ultrasound for shoulder scans and musculoskeletal care:
What you can book with us
Private shoulder ultrasound
A focused scan of your painful shoulder, with movement assessment, on-the-spot explanation, and a written report within 24 hours.
Book a private shoulder ultrasoundMusculoskeletal Health Check
Not sure where the pain is coming from? This comprehensive assessment looks at your shoulders, neck, arms, and movement patterns to pinpoint the source of your symptoms and map out next steps.
Book a Musculoskeletal Health CheckOrthopaedic and MSK specialist care
If your scan shows something that needs more than a report, you don’t have to start from scratch elsewhere. Our orthopaedic and MSK specialists can review your results, discuss treatment options (including injections and rehab), and create a clear plan with you—all in the same place.
Explore our musculoskeletal servicesFrequently asked questions
Do I need a GP referral for a private shoulder ultrasound?
No. You can book directly with us. Just tell us on the day if you’d like your results sent to your GP, physiotherapist or consultant, and we’ll arrange it.
Is a shoulder ultrasound safe? Does it use radiation?
Yes, it’s completely safe. Ultrasound uses sound waves, not radiation. Nothing is injected, and there’s nothing you need to avoid afterwards.
When will I get my results?
Your sonographer will talk you through what they found on the screen before you leave. Your full written report is emailed to you within 24 hours.
Can a 50% torn rotator cuff heal on its own?
The torn tendon fibres don’t knit back together on their own. Many people feel much better over time because the rest of the shoulder adapts and strengthens with physiotherapy. The tear usually stays the same or slowly enlarges. A baseline scan tells you exactly where things stand now.
How much does rotator cuff surgery cost in the UK?
Privately, hospital charges for a rotator cuff repair start from around £6,275 at a London private hospital. This covers admission to discharge only. Surgeon, anaesthetist and diagnostic fees are billed separately, so the total is usually higher. Prices vary by hospital and surgeon.
How long is the NHS wait for rotator cuff surgery?
The NHS standard is that 92% of patients should start treatment within 18 weeks of referral. Waiting times vary by area and specialty. Trauma and orthopaedics has one of the longest waiting lists. You can check your local figures on the NHS My Planned Care website.
What is the average compensation for a rotator cuff injury in the UK?
There’s no meaningful average. Compensation depends on your individual case, the impact on your life and work, and the strength of your evidence. Only a solicitor can advise you on your specific situation. Most claims need a dated, written record of the injury from a qualified clinician. Our report includes the reporting clinician’s registration details and is yours to share.
How is a private shoulder scan different from an NHS one?
The scan itself is done to the same clinical standards. The difference is speed and clarity. You get an appointment within days, not weeks or months. You leave knowing your result the same day, without waiting for a letter or a follow-up call.
Get clarity on persistent shoulder pain
Book a private shoulder ultrasound from £199 at our Harley Street or St Albans clinic, without a GP referral.
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