Overview
Calcific tendinitis (shoulder) is a common, often painful problem where calcium deposits build up inside a rotator cuff tendon, most frequently the supraspinatus tendon. When the deposits irritate the tendon and nearby bursa, the shoulder can become inflamed, leading to pain, stiffness, and difficulty lifting the arm. Symptoms can range from mild discomfort to severe flare-ups that limit sleep and daily activities. Many cases improve with non-surgical care, especially when treatment is started during or soon after an acute painful episode.
Symptoms
Patients typically feel pain in the outer or front side of the shoulder, often worse when reaching overhead, fastening a seatbelt, putting on a shirt, or lifting objects. A painful "arc" may develop when raising the arm, along with reduced range of motion and stiffness. Night pain is common, and some people notice weakness mainly because movement is too painful. Symptoms may come on gradually or flare suddenly, depending on the stage of calcium deposit irritation.
Causes
Calcific tendinitis happens when calcium crystals form within the rotator cuff tendon and then irritate surrounding tissues, triggering inflammation. The process can be related to tendon degeneration and abnormal tissue healing over time rather than a single injury. At certain stages, the deposits can become more active and painful, creating an acute inflammatory episode.
Risk Factors
Age-related tendon changes make calcific tendinitis more likely, particularly in adults in midlife. Limited shoulder mobility, repetitive overhead activity, and certain work or sports demands can increase tendon overload and irritation. People with shoulder stiffness from other causes may also notice symptoms more strongly during flare-ups. Diabetes and thyroid disease are associated with a higher risk in some patients.
Prevention
You can reduce recurrence by keeping rotator cuff and shoulder blade muscles strong and balanced, especially with controlled stretching and strengthening rather than only pushing through pain. Gradually increasing overhead or lifting workloads and improving technique can help limit tendon overload. If you develop early shoulder tightness, addressing mobility and posture promptly may reduce the chance of prolonged flare-ups. Maintaining overall metabolic health, including good diabetes management when applicable, may also help.
How the Diagnosis Is Evaluated
Clinicians usually start with a focused history about pain location, overhead motion triggers, and whether symptoms began gradually or suddenly. A physical exam checks shoulder range of motion and pain with specific movements, helping distinguish calcific tendinitis from other rotator cuff problems or frozen shoulder. X-rays can identify calcium deposits, while ultrasound or MRI may be used if symptoms are atypical or if there's concern for another source of pain, such as a rotator cuff tear. Not every test is necessary for every patient, and the plan depends on exam findings and symptom severity.
Nonsurgical Treatment Options
Most patients improve with conservative treatment, beginning with activity modification to reduce painful overhead motion and allow the inflamed tendon to calm. Physical therapy focuses on restoring shoulder mobility, improving rotator cuff and scapular strength, and using a gradual stretching and strengthening program to reduce recurrence. Nonsteroidal anti-inflammatory drugs (NSAIDs) or short-term topical anti-inflammatory options can help pain and inflammation, when safe for the patient. If pain remains limiting, corticosteroid injections may reduce inflammation and help you participate in rehab more effectively. Some patients benefit from image-guided procedures such as extracorporeal shockwave therapy or ultrasound-guided needling of the deposit, and in select cases clinicians may consider biologic or regenerative injection options such as platelet-rich plasma (PRP) after careful evaluation.
When to Seek Medical Attention
Seek medical attention promptly if pain is severe and you cannot use your arm normally, or if symptoms rapidly worsen over days rather than improving. Get urgent care if you have major swelling, redness, fever, or warmth around the shoulder, which can suggest infection or another urgent problem. Seek evaluation urgently if you develop sudden, significant loss of strength, new numbness or tingling down the arm, or any sudden inability to lift the arm after a minor incident.
Frequently Asked Questions
Yes, many cases improve over time as the calcium deposit irritates less and the inflammation settles, especially with supportive care and physical therapy.
Surgery is rarely the first step, and most people respond to non-surgical treatments such as therapy, pain control, and injections if needed.
Next Steps
If you have persistent shoulder pain, stiffness, or difficulty lifting your arm, schedule an evaluation so a clinician can confirm the diagnosis and rule out other causes. Starting a targeted home program and/or physical therapy early can improve comfort and function while the inflammation settles. If pain is severe or limiting sleep, ask about injection options or advanced non-surgical approaches based on your exam and imaging results.