Calcific tendinopathy is a condition where calcium deposits form within a tendon, most commonly in the rotator cuff tendons of the shoulder. Calcium deposits are often present without causing symptoms and are sometimes found incidentally on imaging. When symptoms do occur, it is often because the body has started to break the deposit down, which can trigger a temporary spike in inflammation and tissue sensitivity.
Calcific tendinopathy typically affects people between the ages of 30 and 60 and is more common in women. While it is predominantly seen in the shoulder, it can also occur in other areas such as the hip (gluteal tendons), elbow (common extensor tendon), Achilles tendon, and patellar tendon. In the shoulder, calcium most often sits within the rotator cuff near where the tendon attaches to the top of the upper arm bone.
Calcific tendinopathy is generally described in four stages: resting, formative, resorptive, and reparative. Most people seek help during the resorptive stage, which is commonly associated with increased pain and movement restriction. During this stage, the body tries to reabsorb the deposit and, in doing so, can create a strong inflammatory response. Physiotherapy at this point focuses on settling pain and inflammation, maintaining shoulder mobility to help prevent secondary stiffness, and then gradually rebuilding strength and control so you can return to normal function.
From a physiotherapy perspective, calcific tendinopathy is not just a “wait it out” problem. A physiotherapist helps calm irritated tissues, keeps the shoulder moving safely, and then progresses your rehab with rotator cuff and shoulder blade strengthening to restore confident reaching, lifting, sport, work, and sleep.
Key Facts
- Calcific deposits have been observed in 7.8% of asymptomatic people and 42.5% of people with subacromial pain syndrome in an analysis of 1219 patients. 🔗
- In a study of 302 women, 67% of shoulders with ultrasound-confirmed calcific tendinopathy were asymptomatic. 🔗
- In one study, 71.6% of patients with calcific tendinitis were women 🔗
Risk Factors
- Age typically between 30 and 60.
- Female sex.
- Diabetes (especially long-standing).
- Thyroid disorders.
- Repetitive overhead activity (work or sport), particularly with sudden load increases.
- Family history of calcific tendinopathy or similar tendon problems.
Symptoms
- Localised pain near the affected tendon, which may come on gradually or suddenly (mild discomfort through to intense, debilitating pain).
- Pain at rest or at night, particularly when lying on or putting pressure on the affected area.
- Restricted movement in the affected limb or joint, especially during the acute or resorptive phase.
- Tenderness to touch over the affected area.
- Reduced strength, especially in movements that load or stretch the affected tendon.
- Sudden worsening of symptoms, often seen during the resorptive phase when the body begins to break down and absorb the calcium deposit, leading to increased inflammation and pain.
Aggravating Factors
- Reaching overhead (cupboards, hanging washing, painting, swimming strokes).
- Reaching behind the back (bra strap, back pocket, tucking in a shirt).
- Lifting or carrying away from the body (shopping bags, kids, tools).
- Sleeping on the affected side.
- Repetitive tasks at shoulder height or above (trades, warehouse work, gardening).
- Sudden increase in training loads (gym pressing, throwing, racquet sports).
Causes
The exact cause of calcific tendinopathy is not well known, however it has been linked to several contributing factors:
- Overuse or repetitive strain: Activities involving repeated overhead arm movements such as swimming, painting, or certain trades may increase the risk. In physiotherapy assessment, this often shows up as “load intolerance”, where the tendon is not coping with the current amount or type of activity.
- Age-related changes: The condition is more common in middle-aged adults, possibly due to reduced tendon blood supply with age.
- Impaired healing processes: Microtraumas or degeneration may lead to poor tendon healing, creating an environment where calcium can deposit.
- Hormonal influences: There is a higher prevalence in women, particularly around perimenopausal age. This does not mean hormones are the sole cause, but they may influence tendon metabolism and vulnerability.
- Diabetes and thyroid disorders: These metabolic conditions are associated with a higher risk. In rehab, this matters because tendon sensitivity, healing rate, and stiffness risk can be different, so pacing and exercise progression may need extra care.
- Genetic predisposition: There may be a familial tendency in some individuals.
How Is It Diagnosed?
Diagnosis typically begins with a thorough clinical assessment by a physiotherapist or doctor, including:
History taking: Identifying the nature, location, and pattern of pain, particularly night pain and pain with overhead activity. Your physiotherapist will also ask about recent workload changes, sleep disruption, metabolic factors (such as diabetes/thyroid disease), and whether the pain came on gradually or “out of the blue” (common in the resorptive phase).
Physical examination: Assessing range of motion, muscle strength, and shoulder function. A physio will often check for painful arc patterns, rotator cuff loading tolerance, shoulder blade control, and whether pain is limiting movement (pain inhibition) versus true stiffness (capsular tightness). This distinction is important because it changes your calcific tendinopathy rehab plan.
There are many different causes of shoulder pain and the symptoms can overlap. It can also be common for more than one structure to be irritated at the same time (for example calcific tendinopathy and bursitis). A physiotherapist uses your symptom pattern, movement testing and sometimes imaging to work out what’s most likely driving your pain. Based on these patterns, here are some of the more common differential diagnoses for shoulder pain:
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Calcific tendinopathy (resorptive phase): Often a sudden onset of very strong shoulder pain (sometimes over 24–72 hours), marked night pain, and a quick drop in movement because it’s too sore to lift the arm.
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Rotator cuff related shoulder pain: More commonly gradual onset over weeks to months; pain is mainly with lifting, reaching, overhead work, pushing/pulling, gym, and tends to ease with rest.
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Subacromial bursitis: Can be acute or gradual; sharp pain with lifting the arm and lying on the shoulder. Often overlaps with calcific tendinopathy (you can have both).
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Frozen shoulder (adhesive capsulitis): Typically progressive stiffness over weeks to months. The key feature is true restriction where even someone else can’t manually move your shoulder much.
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Rotator cuff tear: Often follows a clear incident (fall, heavy lift, sudden yank) and causes noticeable weakness.
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AC joint pain: Pain is localised right on the tip/top of the shoulder, often worse with reaching across your body and some pressing movements.
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Shoulder osteoarthritis: Usually long-term, gradual ache and stiffness, sometimes grinding/clicking; less likely to cause a sudden dramatic flare without a trigger.
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Neck-related referred pain: Symptoms may travel down the arm with pins and needles, numbness, or pain below the elbow; neck movements can change symptoms.
Due to this overlap with other shoulder conditions, imaging can be useful for definitive diagnosis. Importantly, the presence of calcium deposits on imaging does not always correlate with pain or dysfunction. Some individuals may have visible deposits on imaging, however have no symptoms.
Investigations & Imaging
- Plain X-ray
- First-line and often most useful test. Calcium deposits can be seen clearly, and the deposit’s shape/density may suggest the phase (more defined in formative/resting, more cloudy in resorptive).
- Ultrasound
- Helps identify the size, shape, and exact location of deposits and can assess associated bursitis. Also commonly used to guide procedures such as barbotage/lavage.
- MRI (Magnetic Resonance Imaging)
- Not typically required to diagnose calcific tendinopathy, but may be used if other conditions are suspected (for example, significant rotator cuff tear, labral pathology, or unexplained persistent symptoms).
Grading / Classification
- Pre-calcific stage
- Tendon cells change early on before calcium appears. Often no symptoms.
- Formative phase
- Calcium crystals start forming within the tendon. Symptoms can be mild or absent, and the deposit often looks dense and well-defined on X-ray.
- Resting phase
- Deposit remains relatively stable. Some people are pain-free; others have intermittent pain with load.
- Resorptive phase
- The body begins breaking down/reabsorbing the deposit. Often the most painful stage, commonly with night pain and significant movement restriction.
- Reparative (post-calcific) phase
- Tendon tissue heals and remodels after the deposit has been resorbed. Pain usually settles, but stiffness and weakness can remain without rehab.
Physiotherapy Management
Physiotherapy management in the initial phase involves reducing pain and inflammation and gradually moves towards more active treatment to restore range of motion and strength.
Exercise
In the painful resorptive phase, calcific tendinopathy physiotherapy exercises often start with gentle, low-irritability movements that keep the shoulder from “freezing up” while respecting pain. This commonly includes pendulum swings, supported table slides, wall-assisted elevation, and pain-limited external rotation work. As symptoms settle, your physiotherapist will progress to rotator cuff strengthening (for example, banded external rotation, scapular plane elevation within tolerance, and controlled rows), then build capacity for the tasks you actually need: overhead reaching, lifting, work tools, sport skills, and gym exercises. The key is dosage. Tendons respond best to consistent, graded loading rather than big spikes in activity.
Activity Modification
Avoiding aggravating movements, especially overhead lifting, is often necessary early on, but “rest” in physiotherapy does not mean doing nothing. Your physio will help you identify which activities are truly flaring the tendon and modify them temporarily. This may include changing sleep position, using a pillow to support the arm, swapping to lighter loads, breaking tasks into shorter blocks, and avoiding repeated end-range positions that pinch the irritated tissues. The goal is to keep you active while giving the tendon a calmer environment to settle.
Manual Therapy
During the acute resorptive phase, the focus is on reducing pain and inflammation and helping you move more comfortably. Manual therapy may include gentle joint mobilisations to reduce pain and improve shoulder mechanics, and soft tissue techniques to reduce protective muscle guarding around the neck, upper back, and shoulder blade. Manual therapy is most effective when it is used to “open a window” for movement, so your physiotherapist will usually pair it with mobility work straight away to help the gains stick.
Postural Retraining
Posture is not about sitting perfectly upright all day. In calcific tendinopathy rehab, postural retraining usually targets shoulder blade positioning and upper back movement, because these influence how the rotator cuff tendons load during reaching. Your physiotherapist may use cues and exercises to improve scapular upward rotation and posterior tilt. This can reduce sensitivity with overhead tasks and make strengthening more comfortable.
Bracing & Taping
Taping can be applied to the shoulder to support and reduce stress on the tendon, providing symptom relief for the patient. In calcific tendinopathy, taping is commonly used to reduce painful arc symptoms and encourage better shoulder blade positioning during daily tasks. It is usually a short-term aid while exercise capacity builds.
Shockwave
Extracorporeal shockwave therapy (ESWT) uses focused sound waves to help break up the deposit and stimulate healing. This has shown promising results for calcific tendinopathy in the research and may be applied by your physiotherapist as part of your treatment. In a study conducted by Louwerens et al. in 2020, 67% of the shockwave therapy group (ESWT) reported either “improvement” or “strong improvement” in symptoms at 1-year follow-up. In practice, ESWT is usually considered when pain persists despite a solid rehab plan, particularly when X-ray or ultrasound confirms a deposit that is likely contributing to symptoms. ESWT is rarely a standalone fix and tends to work best when combined with a structured strengthening and mobility program.
Heat & Ice
Ice therapy in the form of ice-packs can be applied to the affected area to help reduce pain. This can be applied for 10 to 15 minutes at a time with at least 2 to 3 hours between applications. Some people prefer heat, particularly once the sharp inflammatory pain settles and stiffness becomes more prominent. Your physiotherapist will help you choose the option that best calms your symptoms so you can move more freely.
Education
Education is a major part of physiotherapy for calcific tendinopathy because fear and uncertainty often drive guarding, which can worsen stiffness and pain. A physiotherapist will explain the likely phase you are in, why night pain happens, why imaging does not always match symptoms, and how to pace activity without deconditioning the shoulder. You will also be taught clear “rules” for exercise pain (for example, acceptable pain during exercise and expected symptom settling time) so you can progress confidently rather than avoiding movement altogether.
Other Treatments
In cases where physiotherapy alone is insufficient, or symptoms are severe, additional options may include:
Non-steroidal anti-inflammatory drugs (NSAIDs): To reduce pain and inflammation, especially during flare-ups. These can be helpful in the resorptive phase when inflammation is high, making it easier to sleep and tolerate gentle physiotherapy exercises.
Corticosteroid injections: Can offer short-term pain relief, particularly when inflammation is prominent (often when bursitis is present). They should be used judiciously due to potential side effects, including tendon weakening, and because pain relief can tempt people to return to full overhead load too quickly. Physiotherapy is important after an injection to rebuild strength and control while symptoms are quieter.
Needling (barbotage): A procedure where the calcium deposit is broken up and aspirated using ultrasound guidance, often followed by a corticosteroid injection. If this is performed, your physiotherapist will typically progress mobility first, then load, to reduce the chance of lingering stiffness.
Ultrasound-guided lavage: Similar to barbotage, this technique uses saline solution to flush out calcium deposits. Physiotherapy remains important afterwards to restore movement quality and rebuild tendon capacity.
Platelet-rich plasma: Evidence is still emerging, and use varies. If it is used, physiotherapy still provides the key “mechanical signal” for tendon adaptation through graded loading.
Surgery
Surgery is generally considered only when conservative treatments fail after 6 to 12 months, or if the calcium deposit is large and causing persistent pain or functional impairment. This may involve arthroscopic removal, which is a keyhole procedure used to remove the calcium deposit and clean the tendon. Sometimes the surgeon may also address associated bursitis or repair a tendon defect depending on what is found at the time.
From a rehab point of view, surgery is not the “end” of calcific tendinopathy. Physiotherapy after surgery focuses on restoring comfortable range of motion early, then rebuilding rotator cuff and shoulder blade strength, and finally reintroducing overhead work, sport, and gym activities. It is common for pain and function to improve gradually over months rather than instantly, so a structured, progressive rehab plan matters.
Prognosis & Return to Activity
Calcific tendinopathy is often self-limiting, meaning the body can successfully reabsorb the calcium during the resorptive phase. Some people improve quickly once the acute inflammatory flare settles, while others have a more drawn-out course with intermittent flare-ups and stiffness.
In many cases, symptoms resolve over 6 to 12 months. With targeted physiotherapy, many people can regain near-normal shoulder function. Return to activity is usually staged. Early on, the goal is comfortable daily tasks and better sleep. Next comes restoring full, confident range of motion. Then the focus shifts to strength and endurance of the rotator cuff and shoulder blade muscles so the shoulder can tolerate repeated overhead use again.
A physiotherapist will guide return-to-work or return-to-sport decisions based on your pain behaviour, movement quality, strength symmetry, and your ability to handle progressive loading without symptom spikes. For some people, even when pain settles, there can be a “rehab gap” where the shoulder feels weak, stiff, or uncoordinated. That is exactly where calcific tendinopathy rehab helps prevent recurrence.
Complications
- Secondary shoulder stiffness (including adhesive capsulitis-type restriction), especially if movement is avoided for weeks.
- Persistent pain due to ongoing bursitis or tendon sensitivity despite deposit changes.
- Reduced shoulder strength and endurance, leading to repeated flare-ups with overhead activity.
- Sleep disruption and associated neck/upper back pain from protective postures.
Preventing Recurrence
- Gradually build overhead capacity: increase lifting, throwing, swimming, or gym loads in small steps so the rotator cuff tendon adapts rather than flaring.
- Avoid prolonged overhead tasks early after recovery: break jobs like painting, ceiling work, or hanging washing into shorter blocks with rest breaks to reduce tendon compression and irritation.
- Maintain rotator cuff and shoulder blade strength: ongoing physiotherapy-style exercises (external rotation strength, rows, controlled overhead patterns) help keep the tendon resilient.
- Keep shoulder mobility “topped up”: if behind-the-back reach or overhead reach starts tightening again, restart gentle mobility drills before stiffness escalates.
- Optimise metabolic factors where possible: good diabetes management and addressing thyroid issues can support tendon health and reduce recurrence risk.
- Improve sleep positioning: avoid sustained compression by not sleeping directly on the shoulder; use pillows to support the arm in a neutral position during flare-prone periods.
When to See a Physio
- You have shoulder pain that wakes you at night, especially if it is worse when lying on that side
- You cannot comfortably lift your arm overhead or reach behind your back, and this is limiting work, sport, or daily tasks.
- The pain came on suddenly and severely (common in the resorptive phase)
- Your shoulder is becoming progressively stiffer week to week.
- You have had an injection, barbotage, or lavage and want a clear plan for safe calcific tendinopathy rehab afterwards.
- Symptoms have persisted despite self-management, or you keep getting flare-ups when you try to return to activity.