If you've been told you have calcium in your shoulder tendon, you'll know how debilitating the pain can be. The good news is that calcific tendonitis usually has a favourable natural history, and there are effective ways to control the pain. Ultrasound-guided barbotage is one option I offer, and I'll always be straight with you about what the evidence does and doesn't show.
What is calcific tendonitis?
Calcific tendonitis, also called calcific tendinopathy or calcific tendinosis, is the build-up of calcium (hydroxyapatite) deposits within the rotator-cuff tendons of the shoulder, most commonly the supraspinatus. These aren't bone spurs or arthritis; they're calcium crystals forming within the tendon itself, a bit like a piece of chalk forming inside it. When your body tries to reabsorb a deposit, it triggers an intense inflammatory response, and that's when the severe pain kicks in.
A note on terms: "tendonitis" and "tendinitis" mean the same thing (inflammation of a tendon), while "tendinopathy"/"tendinosis" is a broader term that includes degenerative change too. "Calcific tendinopathy" is generally more accurate, because continuous inflammation isn't always present, although it can be prominent during the painful resorptive phase. In practice the terms are used interchangeably.
Calcification seen on an X-ray or ultrasound isn't automatically the cause of your pain. Deposits can be completely painless, and symptoms may instead come from associated rotator-cuff tendinopathy, subacromial bursitis, capsular stiffness, altered shoulder loading, pain sensitisation, or a cuff tear. That's why I treat your pain and function, not just the picture on a scan.
Why does it happen?
We don't fully understand it. What's clear is that it's not caused by dietary calcium or supplements, you can't prevent it by changing what you eat. The leading model is an active, cell-mediated process: local tendon cells temporarily change their behaviour and act more like cartilage (metaplasia), producing a matrix in which calcium crystals are deposited. Reduced blood flow and metabolic factors may contribute. Broader tendinopathy research supports a complex interaction between mechanical loading, matrix disruption, inflammatory signalling and impaired repair (Millar et al., 2021).
Reported associations (not proven individual causes) include age ~30–60, female sex, diabetes, thyroid disease, repetitive overhead loading and metabolic/endocrine factors.
The phases of calcific tendonitis
Understanding which phase you're in helps time treatment.
Pre-calcific
The tendon undergoes changes that make it susceptible to calcium deposition. Usually no symptoms.
Formative (calcification)
Deposits build up over months or years, chalk-like and solid on imaging. Often mild or no symptoms.
Resorptive (most painful)
Your body attempts to reabsorb the deposit, triggering intense inflammation. Deposits become soft and liquid, sometimes almost cyst-like on ultrasound. This is when you're in agony, and when treatment tends to be most effective.
Post-calcific
The calcium is reabsorbed, inflammation settles, and the tendon remodels and heals. Pain resolves, though some residual stiffness may remain.
How do I know if I have it?
What makes calcific tendonitis distinctive is the intensity and sudden onset. Many patients describe waking up one morning in agony, unable to move an arm that was fine the day before. Typical symptoms:
- Sudden, severe shoulder/upper-arm pain that develops rapidly (often overnight)
- Significant night pain, you can't lie on the affected side
- Difficulty lifting the arm, especially out to the side or overhead
- A painful arc, or "catching" with certain movements
During my time in the Emergency Department at King's College Hospital, I'd regularly see patients arrive at around 4:30am, having woken in the small hours with sudden, severe shoulder pain and barely able to move their arm. Time and again, the ultrasound revealed a calcified rotator cuff, very often a soft, resorptive-phase deposit. That first-hand experience of the acute presentation is a big part of why I recognise and treat it so readily today.
Is it really calcific tendonitis?
Several conditions overlap, and part of my job is telling them apart: subacromial impingement/bursitis (a painful arc rather than total loss of movement), a rotator-cuff tear (weakness out of proportion to pain), frozen shoulder (gradual, global stiffness), and gout/pseudogout (CPPD), where crystals sit in the joint rather than the tendon (the ultrasound appearance helps distinguish them).
Severe redness and heat in the shoulder, fever or feeling unwell, recent significant trauma, or progressive weakness despite reducing pain all warrant urgent assessment.
How I diagnose it
Diagnosis starts with your history and my examination, the typical story is sudden severe pain with very limited active movement, but better passive movement (showing it's pain, not a mechanical block). X-ray is excellent for confirming a deposit and showing its size and location. Ultrasound is my preferred method because it shows the exact location, the consistency of the deposit (hard/chalk-like vs soft/liquid), associated bursitis, the state of the surrounding cuff, and whether the calcium is in the tendon or the joint. Crucially, it tells me whether you're in the resorptive phase (soft deposits, the ones most amenable to barbotage) or the formative phase (harder deposits).
Treatment: what actually helps
Calcific tendonitis often has a favourable, sometimes self-limiting natural history, deposits can stay painless, flare intermittently, or resorb on their own. So treatment targets pain and function, and follows a sensible sequence:
- Explanation & reassurance, the deposit isn't dangerous, and imaging clearance isn't essential for recovery
- Activity modification & analgesia, reduce provocative overhead loading temporarily; paracetamol or a short NSAID course for flares (complete immobilisation is unhelpful)
- Physiotherapy & graded exercise, restore movement and rotator-cuff/scapular strength, dosed to how irritable the shoulder is
- Subacromial corticosteroid injection, can help when there's substantial bursitis, though it doesn't reliably remove the deposit; notably, the 2023 sham-controlled trial found steroid injection was not superior to local anaesthetic at four months
- Extracorporeal shock-wave therapy (ESWT), a 2020 Cochrane review (32 trials, 2,281 people) concluded it probably provides few or no clinically important improvements over placebo (Surace et al., 2020)
- Ultrasound-guided barbotage, see below
- Surgery, reserved for refractory cases
Barbotage (ultrasound-guided lavage)
Barbotage, also called percutaneous needle lavage or ultrasound-guided calcium aspiration, is a minimally invasive procedure to fragment and wash out a calcium deposit. The word comes from the French for "to stir up." Under continuous ultrasound guidance, I:
- Numb the skin, the bursa and the area around the deposit with long-acting local anaesthetic, and wait for it to take full effect.
- Guide a needle precisely into the calcium deposit.
- For soft, liquid deposits: inject sterile saline and aspirate it back, you can often see the milky, calcium-laden fluid come out.
- For hard, chalk-like deposits: repeatedly needle ("peck at") the deposit to break it into fragments, like breaking a sugar cube so it dissolves faster, which also stimulates a healing response.
- Usually finish with a subacromial corticosteroid injection to settle inflammation.
It takes about 20–30 minutes (a 45–60 minute appointment overall). Done properly with adequate local anaesthetic it isn't painful, most people feel pressure or odd "crunching" sensations rather than pain, and some feel a satisfying sense of movement as the calcium is washed out.
The evidence, an honest view
Barbotage has been used for years, and earlier trials, mostly small and without a convincing sham (placebo) comparison, suggested good improvements in pain, function and deposit clearance, often with success quoted around 60–75%. However, the strongest test to date changed the picture: a large double-blind, sham-controlled trial in the BMJ (Moosmayer et al., 2023, 220 patients) found that ultrasound-guided lavage plus steroid was no better than a sham procedure at four months, and still no better at 24 months. The accompanying editorial concluded that lavage should no longer be assumed to be automatically effective (Robinson et al., 2023).
I'll be honest with you about what that means: the average benefit of barbotage over a convincing placebo is uncertain. Importantly, the trial doesn't prove barbotage can never help an individual, and clinical improvement doesn't actually require the deposit to be fully removed. In my own practice I do see selected patients, particularly with soft, resorptive-phase deposits, improve after the procedure. So I offer barbotage as a shared decision, with realistic expectations, rather than presenting it as a guaranteed fix.
Through shared decision-making, the most plausible candidate has:
- Persistent, substantial pain and disability
- Imaging-confirmed calcification that matches the clinical findings
- Failure of an adequate exercise and conservative programme (usually 6–12 weeks)
- A deposit that's accessible on ultrasound and soft/fragmented enough to aspirate
- No better explanation for the pain (e.g. frozen shoulder or a large cuff tear)
- A clear understanding that benefit beyond a placebo is uncertain
What are the risks?
Barbotage is very safe under ultrasound guidance; serious complications appear uncommon. Possible effects include a temporary pain/inflammatory flare for 24–48 hours (fairly common), bruising, and, rarely, infection or a vasovagal reaction. There have been rare reports of tendon rupture, typically in shoulders with significant pre-existing tendon degeneration, which is why I assess tendon quality on ultrasound first. If you're diabetic: the corticosteroid can raise blood sugar for 1–2 weeks; I won't proceed if your HbA1c is above 8.5 (type 1 or insulin-treated).
If barbotage isn't right, or doesn't work
For persistent symptoms, options include ESWT (evidence uncertain, as above) and, rarely, surgery. Arthroscopic calcium removal (sometimes with bursectomy or tendon repair) may be considered for severe symptoms that persist despite prolonged, well-delivered non-operative care. Surgery can remove the calcium but carries risks, infection, stiffness, persistent pain, tendon injury and a longer recovery, so it's reserved for carefully selected, refractory cases rather than for calcification on a scan alone.
Your recovery after barbotage
Days 1–2, initial response
You might feel immediate relief, or a temporary flare as the inflammation settles, both are normal. Rest the shoulder ~48 hours, ice regularly, paracetamol/ibuprofen as needed, and avoid reaching or overhead activity.
Days 3–7, early improvement
Most people notice significant improvement; the severe, constant pain typically resolves. Begin gentle, pain-free movement and light daily activity.
Weeks 2–4, progressive recovery
Substantial improvement; most are sleeping comfortably. Start gentle strengthening and cautious overhead work. Physiotherapy is genuinely helpful from here.
Months 2–3, full recovery
Most patients are back to full, pain-free function, continuing progressive loading. If symptoms haven't improved, come back for reassessment.
Physiotherapy helps once the initial acute inflammation settles (after the first week), before that, simple home exercises and rest are enough. Recurrence in the treated tendon is uncommon, though you can develop new deposits elsewhere.
Real patient stories
"I woke up one Thursday and couldn't move my right arm at all, worse than childbirth, honestly. An X-ray showed a large calcium deposit. I had the barbotage on the Monday, and by Wednesday the excruciating pain was gone. Within a month I was completely back to normal."
"It went from a niggle to absolute agony overnight, I couldn't lift anything with my right arm. During the barbotage I could actually feel the calcium being washed out. The relief was almost immediate; I was back at work within two weeks."
"The ultrasound showed the deposit was soft and liquid, the ideal type. The relief after the procedure was life-changing; the severe pain was gone within days. I needed some physio afterwards to get my strength back, but the debilitating pain never returned."
"Mine was hard calcium, like chalk. He broke it up by needling it repeatedly. The improvement wasn't instant, but over the next month the pain gradually settled. Three months later a scan showed the calcium had almost completely gone."
Frequently asked questions
Does barbotage definitely work?
Is the procedure painful?
Will I need more than one treatment?
Does it work for hard calcium deposits?
Will the calcium come back?
When can I drive or return to work?
Will my insurance cover it?
References
- Moosmayer S, Ekeberg OM, Hallgren HB, et al. Ultrasound guided lavage with corticosteroid injection versus sham lavage with and without corticosteroid injection for calcific tendinopathy of shoulder: randomised double blinded multi-arm study. BMJ. 2023;383:e076447. bmj.com
- Robinson DM, McInnis KC, Rhim HC, Tsitsilianos N. Lavage treatments for calcific rotator cuff tendinopathy [editorial]. BMJ. 2023;383:p2248. bmj.com
- Surace SJ, Deitch J, Johnston RV, Buchbinder R. Shock wave therapy for rotator cuff disease with or without calcification. Cochrane Database Syst Rev. 2020;(3):CD008962. cochrane.org
- Millar NL, Silbernagel KG, Thorborg K, et al. Tendinopathy. Nature Reviews Disease Primers. 2021;7:1. nature.com
- Kim MS, et al. Diagnosis and Treatment of Calcific Tendinitis of the Shoulder. 2020. PMC
- Gatt DL, et al. Ultrasound-Guided Barbotage for Calcific Tendonitis of the Shoulder: a systematic review. 2014. PubMed
- Lee JP, et al. Clinical and Radiological Outcomes of Ultrasound-Guided Barbotage. 2022. PMC
This page is for general information and does not replace individual medical advice. Suitability for any treatment is confirmed following clinical assessment.