Medically reviewed by Eric L. Giang, DO
Some of the most intense shoulder pain I see in my Modesto practice doesn’t come from a fall or a torn tendon. A patient wakes up with a shoulder that hurts so badly they can barely lift a coffee cup. They can’t remember doing anything to it. On the X-ray, the explanation is usually easy to spot: a dense white patch of calcium in the rotator cuff tendon. That’s called calcific tendinitis of the shoulder.
It happens when calcium builds up inside one of the rotator cuff tendons. In this post, I’ll explain why these deposits form and why the pain can come on so suddenly. I’ll also walk through how I approach treatment, from physical therapy and injections to the smaller group of patients who need the deposit removed.
Key Takeaways
- Calcific tendinitis of the shoulder is a buildup of calcium inside a rotator cuff tendon, most commonly seen in adults between about 40 and 60.
- The most painful phase tends to occur when the body starts breaking down and reabsorbing the deposit, which is why pain can flare suddenly and severely.
- Most patients improve with non-surgical care such as physical therapy, anti-inflammatory medication, and injections. For a stubborn deposit, a needle procedure called barbotage may be another option.
- Arthroscopic removal of the deposit is an option for the smaller group whose pain persists despite a fair trial of conservative treatment.
What Is Calcific Tendinitis?
The rotator cuff is a group of four muscles and tendons that wrap around the ball of the shoulder. Together, they help lift and rotate the arm. In calcific tendinitis, calcium crystals collect inside one of those tendons, most frequently the supraspinatus, which runs across the top of the shoulder.
This isn’t the same as the calcium in your bones, and it doesn’t come from eating too much dairy or taking a calcium supplement. The deposit forms within the tendon tissue itself, and researchers still don’t fully understand why it happens in some people and not others.
It’s also different from a rotator cuff tear or bursitis, though the three can overlap. A calcium deposit can irritate the bursa above it and cause the same pinching pain with overhead reaching. When I evaluate your shoulder, I sort out which of those problems is the real pain generator, because the treatment differs.
Why the Pain Can Be So Sudden
Calcific tendinitis tends to move through phases. In the formative phase, calcium slowly builds inside the tendon. Many people have no symptoms at all during this stage, and some deposits are discovered by accident on an X-ray taken for another reason.
Later, the body begins to break the deposit down on its own. This resorptive phase is when many patients experience their worst pain. The calcium softens into a toothpaste-like consistency, the area becomes inflamed, and pressure inside the tendon rises. Patients commonly describe a deep, throbbing ache that can make sleep nearly impossible.
Symptoms Worth Paying Attention To
The symptoms vary quite a bit depending on the phase. Two stand out most in the patients I evaluate.
The first is severe pain that seems out of proportion to any injury. A patient may go to bed feeling fine and wake up unable to raise the arm. Because the onset can be so abrupt, some people head to urgent care assuming they’ve dislocated or broken something.
The second is night pain, particularly when lying on the affected side. Plenty of shoulder conditions cause night pain. With calcific tendinitis, it can be intense enough to keep someone up for days at a stretch.
Between flares, some patients notice a milder ache and a painful catch when lifting the arm overhead. Stiffness can develop as people instinctively stop using the shoulder, which is one reason I don’t want patients to wait too long before getting evaluated. A shoulder that stays still for weeks can start to look a lot like frozen shoulder.
How I Diagnose It
An X-ray is the key test here. Calcium shows up clearly on a standard X-ray. The size, location, and appearance of the deposit also give me clues about which phase it’s in.
I also do a full shoulder exam to check rotator cuff strength and range of motion. Sometimes I suspect a tear alongside the deposit, or the symptoms don’t match the X-ray. In those cases, an MRI or ultrasound can add detail about the surrounding tendon. I’d rather order an X-ray at the first visit than spend months guessing, because it changes the plan for these patients.
What I See in My Patients
The typical patient with calcific tendinitis in my practice is between about 40 and 60, active, and has no memory of injuring the shoulder. Many of them work jobs or keep up hobbies that involve reaching overhead. Here in the Central Valley, that includes orchard and farm work, warehouse jobs, and a lot of gardening. Still, plenty of my patients can’t point to any particular cause.
What stands out to me is how many have been told it’s “just bursitis.” Some spend months on generic advice without anyone ordering an X-ray. For patients who work overhead, one of the first questions is when they can get back to the job. I plan that return around their pain and shoulder strength rather than a fixed date, often starting with lighter duty. I also see patients who’ve had a deposit for years without problems, then suddenly flare.
I treat the deposit’s appearance and the patient’s symptoms as two separate questions. A large deposit doesn’t automatically mean surgery, and a small one can still cause significant pain.
My Approach to Treatment
I start with conservative care, because the majority of patients improve without an operation. The goal early on is to control pain and inflammation while the body does its own work on the deposit.
For many patients, that begins with anti-inflammatory medication, activity modification, and ice during painful flares. Once the worst of the pain settles, physical therapy helps restore range of motion and rebuild rotator cuff strength. A stronger cuff can reduce the pinching that aggravates the tendon.
When pain is severe, a cortisone injection into the space above the rotator cuff can provide meaningful relief, particularly during an acute flare. I’m careful with repeated injections, since they carry their own risks to tendon health. For some patients, PRP injections may be worth discussing as an alternative, and I cover how the two compare in my post on cortisone vs. PRP injections.
When a deposit lingers and keeps causing pain, another option I may recommend is barbotage, also called ultrasound-guided lavage. After numbing the area, I use ultrasound to guide a needle into the calcium. I then rinse the deposit with sterile saline to help break it up and draw some of it out. A cortisone injection is often given at the end to calm the surrounding inflammation. Because it’s done through a needle, there are no incisions. Some soreness for a few days afterward is common.
Surgery is reserved for patients whose pain persists despite a fair trial of these treatments, usually over several months. In those cases, I can remove the deposit through arthroscopic debridement of the shoulder, using a small camera and instruments inserted through tiny incisions. If removing the calcium leaves a defect in the tendon, I may repair the tendon during the same procedure.
Recovery Expectations
Recovery depends on the treatment path. With conservative care, many patients notice improvement over weeks to a few months as the deposit resorbs and physical therapy restores motion.
After arthroscopic removal without a tendon repair, a sling is generally used for two to three days. Soreness and stiffness can last a few days, and range of motion may feel limited for a few weeks. When the tendon also needs repair, expect the sling to stay on for several weeks, followed by a longer, more protected rehabilitation plan.
I map out a specific timeline with each patient based on what I find during treatment.
Can Calcific Tendinitis Come Back?
It can. Some patients develop a new deposit in the same shoulder years later, and a smaller number notice one in the other shoulder. There’s no proven way to prevent calcium from forming.
What I can influence is how well the shoulder functions around it. Patients who keep up the rotator cuff and shoulder blade exercises from physical therapy tend to handle a future flare better, in my experience. I’d encourage anyone with a history of calcific tendinitis to come in early if that familiar, sudden pain returns. Catching a flare at the start can make it easier to control.
Summary
Calcific tendinitis of the shoulder is a calcium buildup inside a rotator cuff tendon that can cause sudden, intense pain. That pain frequently peaks as the body works to break the deposit down. A simple X-ray usually confirms the diagnosis. Most patients improve with medication, physical therapy, and injections. Barbotage may help break up a stubborn deposit, while arthroscopic removal remains an option when pain persists despite conservative care.
Maybe you’re dealing with sudden, severe shoulder pain or night pain that won’t let up, and no one has taken an X-ray yet. That’s the first step I’d recommend. Call my office at (209) 577-1411 or request an appointment online so we can find out what’s causing it.
Frequently Asked Questions
Does calcific tendinitis go away on its own?
In many cases, the body eventually breaks down and reabsorbs the deposit without surgery. This process can take months, and it’s frequently painful along the way, so treatment during that time focuses on managing pain and preserving motion.
How is calcific tendinitis different from a rotator cuff tear?
A tear is a break in the tendon fibers, while calcific tendinitis is a calcium deposit inside the tendon. The two can coexist, and both can cause pain with overhead reaching. An X-ray shows the calcium, while an MRI or ultrasound may be needed to evaluate a tear.
Will I need surgery for calcific tendinitis?
Most patients don’t. Surgery is typically considered only when pain persists after several months of conservative treatment such as physical therapy, medication, injections, and in some cases barbotage.
How long will I wear a sling after surgery for calcific tendinitis?
After arthroscopic removal without a tendon repair, a sling is generally used for two to three days. If the tendon also needs repair, the sling may stay on for several weeks.
