Overview
A rotator cuff tear is an injury to one or more of the tendons that help lift and stabilize your shoulder, most commonly the supraspinatus tendon. When the tendon is partially or fully torn, the shoulder can become painful and less able to generate normal strength, especially when you lift your arm overhead or reach behind your back. The pain is often worse with movement because the torn tendon and surrounding tissues are irritated during shoulder motion. Many rotator cuff tears are treated successfully without surgery, especially when weakness is not severe and rehabilitation is consistent.
Symptoms
You may notice shoulder pain that worsens with reaching overhead, lifting, or sleeping on the affected side. Some people feel a painful "catch" or weakness when trying to raise the arm, and others have difficulty reaching behind the back for dressing or hygiene. With larger or more acute tears, weakness may be more noticeable and the arm may feel unstable. Over time, shoulder motion can feel stiff, even when there is no major numbness.
Causes
Rotator cuff tears can develop from gradual wear and degeneration of the tendon with age, leading to a breakdown of tendon fibers. They can also occur suddenly after a fall, lifting injury, or forceful overhead movement. In some cases, repeated shoulder impingement and tendon overload over time contribute to tendon damage. A tear may be partial (some fibers remain intact) or full thickness (complete tendon disruption).
Risk Factors
Age is a major risk factor because tendon strength and healing capacity decrease over time. Repetitive overhead work, frequent heavy lifting, and sports that involve throwing or overhead swings increase tendon stress. Prior shoulder injury, smoking, and conditions that reduce blood supply to tendons can also raise risk. Having shoulder stiffness or long-standing impingement can contribute to progressive tendon degeneration.
Prevention
You can reduce risk by strengthening the rotator cuff and shoulder blade muscles and keeping shoulder mechanics efficient during lifting and overhead activities. Gradually building strength and endurance, taking breaks during repetitive overhead work, and avoiding sudden increases in training load can help protect the tendons. Maintaining good overall fitness, flexibility, and posture supports better shoulder function. If you have shoulder pain, early evaluation and guided rehab can prevent minor tendon irritation from progressing.
How the Diagnosis Is Evaluated
A clinician usually starts with a detailed history about how the pain began, whether there was an injury, and what movements trigger weakness or pain. Physical examination often includes specific strength tests and range-of-motion checks, such as assessing painful arc, external rotation strength, and maneuvers like the empty can or drop arm tests when appropriate. Imaging may include an ultrasound or MRI to confirm the tear and determine whether it is partial or full thickness, but not every patient needs advanced imaging right away. X-rays are sometimes used to look for arthritis, bone changes, or calcific tendinitis that can mimic or coexist with a rotator cuff tear.
Nonsurgical Treatment Options
Most treatment begins with activity modification to reduce painful overhead motions while staying generally active within tolerance. Physical therapy is central and focuses on restoring shoulder mobility, improving scapular mechanics, and strengthening the rotator cuff and surrounding muscles to compensate for the tear. Anti-inflammatory medications such as NSAIDs, along with topical pain relievers, may help control pain so you can participate more effectively in rehab. A corticosteroid injection into the subacromial space or around the shoulder can reduce inflammation and pain for short-term symptom relief in selected patients. In some cases, platelet rich plasma (PRP) injections may be considered, particularly for partial tears or tendon-related pain when other conservative measures have not fully helped, though results vary. Trigger point injections may be used when muscle spasm is contributing to pain, and a home exercise plan is typically continued after supervised therapy.
When to Seek Medical Attention
Seek prompt medical attention if you have a sudden loss of shoulder function after an injury, especially if you cannot lift the arm or you develop rapidly increasing weakness. You should also be evaluated urgently if you have fever, significant swelling, redness, or severe pain that does not improve with rest. Get medical advice quickly if you notice progressive numbness, new trouble with hand movement, or symptoms that are worsening despite careful home care. If pain is interfering with basic daily activities or sleep for more than a couple of weeks, schedule a clinical evaluation.
Frequently Asked Questions
Some partial tears can improve with time and rehabilitation, but healing depends on tear size, tendon quality, and how much strength and function you regain.
Rehabilitation often takes several weeks to months, and improvement is typically gradual as strength and shoulder mechanics improve.
Many people find relief by avoiding the painful side, using pillows to support the arm, and keeping the shoulder in a comfortable position during sleep.
Next Steps
If you suspect a rotator cuff tear, the safest next step is to get an in-person evaluation so strength, motion, and imaging needs can be determined. Start with activity modification and a targeted home plan while you wait, but avoid pushing through worsening weakness or rapidly increasing pain. A clinician can help you choose the most appropriate conservative approach to restore function and reduce pain.