Shockwave Therapy for Shoulder Pain in Cape Town

Most shoulder problems build up slowly. Calcific tendinopathy does not always play by that rule. People often describe a shoulder that was more or less fine, and then over a few days became so painful that they could not lift their arm, could not sleep on that side, and could not find any position that helped.

It is also one of the few tendon conditions where we can point at something specific on an image and say, that is what is causing this. A deposit of calcium has formed inside the rotator cuff tendon. Understanding how it got there, and what your body is trying to do about it, explains almost everything about how the condition behaves and why shockwave therapy suits it so well.

What is a calcific deposit and how does it form?

A calcific deposit is a build up of calcium within the substance of a rotator cuff tendon, most commonly the supraspinatus, which runs across the top of the shoulder.

It is worth separating this from ordinary wear and tear, because calcific tendinopathy is not simply an overuse injury. The process appears to be cell driven. Cells within the tendon change character, taking on properties more like cartilage cells, and calcium is laid down in that area. This is the formative phase, and it can be surprisingly quiet. Plenty of people have a deposit sitting in a shoulder that barely bothers them.

After that there is often a resting phase where nothing much happens, sometimes for years. Then the body decides to clear the deposit, and this resorptive phase is where the trouble starts. Blood vessels grow into the area, the deposit softens from a chalky consistency to something closer to toothpaste, and pressure inside the tendon rises sharply. That pressure, combined with the inflammatory activity of the clean up process, is what produces the severe pain people describe.

There is a counterintuitive point here that helps people cope. The most painful stage is the stage where your body is actively getting rid of the deposit. It is destructive to sit through, but it is not a sign that the shoulder is falling apart.

It tends to show up between the ages of thirty and sixty, slightly more often in women, and frequently in people who cannot identify anything they did to bring it on. If you have been searching for the moment you injured your shoulder and cannot find one, that fits the pattern rather than contradicting it.

Why can the pain be severe enough to disturb sleep?

Night pain is one of the most reliable features of this condition, and it comes down to pressure.

During the day, upright and moving, the tendon has more room and the muscles around the shoulder are working. When you lie down, the supporting muscles relax, the position of the shoulder changes, and the pressure inside an already swollen tendon rises. In the resorptive phase that pressure is high to begin with. The result is a shoulder that feels tolerable at nine in the evening and wakes you repeatedly after midnight.

People commonly report pain referring down into the outer upper arm rather than staying at the shoulder, difficulty lying on that side at all, and pain reaching overhead or behind the back to fasten a seatbelt or a bra strap. Sleeping propped up slightly, or with the arm supported on a pillow across the body, often makes the nights more manageable while treatment gets going.

Why does calcific tendinopathy respond particularly well to shockwave therapy?

With most tendon problems, shockwave works by restarting a repair process that has stalled. With calcific tendinopathy it does that and something else as well.

The acoustic pressure waves delivered into the tendon help to break down and fragment the calcium deposit itself, which supports the body's own resorption process and helps disperse the material so it can be cleared. That is a direct mechanical effect on the thing causing the problem, which is why the research evidence for shockwave is stronger in calcific tendinopathy than it is in most other tendon conditions, particularly for deposits that are in the softer, resorptive stage.

It also increases local blood flow and alters how the tendon signals pain, which matters when someone has been guarding the shoulder for weeks.

What shockwave does not do is rebuild the rotator cuff. Even when a deposit disperses completely, you are usually left with a shoulder that has been protected, under used and painful for a period, and a cuff that has lost strength and control as a result. Clearing the deposit without rebuilding the cuff leaves you exposed to the next shoulder problem. The shockwave course and the strengthening programme are one plan, run together by the physiotherapy and biokinetics teams, not two separate things.

Why is imaging useful before starting?

Because it changes whether shockwave is the right choice at all.

Calcium shows up clearly on a plain X ray, so a standard shoulder series will usually confirm whether a deposit is present, where it sits and how large it is. Ultrasound is also useful and adds information about the consistency of the deposit, which helps indicate whether it is in the harder formative stage or the softer resorptive stage.

That matters for three reasons. It confirms you are treating what you think you are treating, since not every painful shoulder with these symptoms has a deposit. It tells us where to aim, because targeting the deposit accurately is part of the treatment. And it gives a baseline, so if your symptoms change we have something to compare against.

Your first appointment is still an assessment rather than a scan referral. In some cases the history and examination point clearly enough that imaging follows as a confirmation step. If imaging is worth arranging, we will explain why before sending you anywhere.

What does a course of shockwave look like?

Sessions run around five to ten minutes over the affected part of the cuff, with gel to conduct the energy. It feels like firm, rapid tapping and it is noticeably more tender directly over the deposit than over the surrounding tissue. Intensity is built up to what you can tolerate and can be reduced at any time.

Most courses run to between three and six sessions, spaced about a week apart, with reassessment along the way. There is no injection and no downtime. It is common to feel achy over the shoulder for a day or two afterwards, and occasionally symptoms flare briefly before improving, which can happen as the deposit begins to break up.

If several sessions have passed with a well progressed programme and nothing has changed, more sessions are not automatically the answer. That is the point to look again at the imaging and the diagnosis, and in some cases to discuss other options such as ultrasound guided needling of the deposit or an orthopaedic opinion.

What does rotator cuff strengthening afterwards involve?

It usually starts before the pain has fully settled, in a form the shoulder can tolerate.

Isometric work comes first. Holding a contraction without moving the joint, pressing the arm outward or inward against a fixed resistance, loads the cuff while keeping the shoulder out of the ranges that hurt. From there we progress into external and internal rotation work with a band or light weight, and add scapular control so the shoulder blade moves properly underneath the arm rather than leaving the cuff to do everything.

The later stages build range and load together, moving toward work with the arm higher and eventually overhead, and toward whatever your shoulder actually needs to do, whether that is swimming, racquet sport, lifting at the gym or reaching into a high cupboard without thinking about it.

The biokinetics team at Peak Movement builds and progresses this programme while the physiotherapist runs the shockwave course and manages your symptoms week to week. The strengthening continues past the point where the shoulder feels comfortable, because comfort returns before capacity does.

What does this look like at Peak Movement?

Peak Movement is on Strand Street in the Cape Town City Centre, with physiotherapy and biokinetics in the same practice, which is what lets the treatment and the rehabilitation run as one coordinated plan.

The first appointment is an assessment. We work out whether a calcific deposit fits your presentation, test how your shoulder and shoulder blade are moving and loading, and decide whether imaging is worth arranging before starting a course. If shockwave suits your case we explain why and what it involves. If your shoulder pain is coming from somewhere else, we will tell you that instead.

Payment is settled at the time of your session. You receive a full invoice including ICD-10 codes, which you then submit to your medical aid yourself.

Frequently asked questions

Will shockwave therapy make the calcium deposit disappear completely?

Often it reduces or clears it, and many people improve substantially even when some deposit remains. The response tends to be better when the deposit is in the softer resorptive stage than when it is hard and well defined. Symptom improvement and the size of the deposit do not always move at exactly the same rate, which is one reason we track how the shoulder is functioning rather than relying on imaging alone.

Do I need an X ray before starting shockwave for my shoulder?

Imaging is often useful, because it confirms a deposit is present, shows where it is and helps guide treatment. An X ray shows calcium clearly and ultrasound adds information about its consistency. We will assess your shoulder first and explain whether imaging is worth arranging in your case before starting a course.

How long does calcific tendinopathy of the shoulder take to settle?

It varies considerably. Some shoulders improve markedly within a few weeks of starting treatment, particularly when the deposit is in the resorptive stage. Others take a few months. The cuff strengthening usually continues for longer than the pain does, because rebuilding strength and control after a painful episode takes time regardless of what happened to the deposit.

If your shoulder is waking you at night or you are struggling to lift your arm, book an assessment with the physiotherapy team at Peak Movement on Strand Street.