Rotator Cuff Tear
What Is a Rotator Cuff Tear?
The rotator cuff is formed by four muscles and their tendons: supraspinatus, infraspinatus, teres minor and subscapularis. Together they centre the upper-arm bone in the shoulder socket and help lift and rotate the arm. A rotator cuff tear occurs when fibres within one or more of these tendons split or detach from their attachment on the humerus.
A partial-thickness tear affects only part of the tendon depth, while a full-thickness tear creates a defect through the entire tendon. Tears also differ in size, location, tendon retraction, muscle quality and whether they developed suddenly or gradually. These details matter because an MRI label alone does not show how much pain, weakness or functional limitation a person has.
What Causes a Rotator Cuff Tear? Risk Factors
Some tears follow a clear injury, such as falling onto the arm, lifting a heavy load unexpectedly or dislocating the shoulder. Others develop as tendon quality changes over time under repeated load. A previously quiet degenerative tendon can also become painful after a relatively minor event without that event being the sole cause of the tissue change.
- Repeated overhead work or sport, especially when workload rises faster than the shoulder can adapt.
- Age-related changes in tendon blood supply, collagen organisation and capacity to recover from load.
- Smoking, diabetes and other factors that can impair tendon health and healing.
- A previous shoulder injury, altered shoulder-blade control or persistent weakness after an earlier problem.
Bone shape and subacromial contact may contribute to symptoms, but a tear is rarely explained by one structure alone. Training technique, recovery, neck and upper-back mobility, and the strength of the shoulder and trunk are assessed together rather than assigning every tear to simple mechanical rubbing.
Symptoms of a Rotator Cuff Tear
Pain is commonly felt over the outer shoulder and upper arm rather than directly on top of the joint. It may increase when reaching overhead, putting on a coat, fastening clothing behind the back or lying on the affected side. Night discomfort can disturb sleep, particularly after a demanding day.
- Weakness when lifting the arm, rotating it outward or controlling an object away from the body.
- A painful arc during elevation and difficulty lowering the arm smoothly.
- Clicking or catching that may accompany pain but does not confirm a tear by itself.
- Loss of active movement even though the arm can be moved farther with assistance in a larger tear.
Tear size and pain do not always match. Some degenerative tears cause few symptoms, while a smaller acute tear can produce marked pain and weakness. Sudden inability to raise the arm after trauma requires timely assessment because it can represent an acute tendon tear, fracture, dislocation or nerve injury.
Rotator Cuff Tear or Another Shoulder Problem?
Several conditions produce similar shoulder and upper-arm pain. Shoulder impingement syndrome can cause a painful arc without a full-thickness tear, while biceps tendinitis tends to cause pain at the front of the shoulder and may coexist with cuff disease. Frozen shoulder causes a progressive loss of both active and passive movement, not weakness alone.
Arthritis, pain referred from the neck, instability and nerve problems can also mimic a tendon disorder. Neck pain, symptoms below the elbow, altered sensation or hand weakness broaden the assessment beyond the shoulder. A careful examination identifies which finding is most likely to explain the functional problem.
How Is a Rotator Cuff Tear Diagnosed?
Assessment covers how symptoms began, night pain, loss of strength, work and sport demands, and previous treatment. The neck, shoulder blade and both shoulders are observed before active and passive movement are compared. Resisted elevation and rotation tests help identify which tendon may be involved, while strength is interpreted cautiously when pain limits effort.
X-rays do not show the tendon but can identify arthritis, fracture, calcification and changes associated with a longstanding large tear. Ultrasound provides a dynamic view of tendon continuity when performed by an experienced operator. MRI shows tear depth, size, retraction, muscle quality and associated biceps, cartilage or labral problems; imaging is ordered when it will change treatment rather than routinely for every episode of shoulder pain.
Non-Surgical Treatment Options
Many people can improve pain and function without an operation, particularly when the tear is degenerative, strength remains useful and daily goals do not demand maximum overhead power. Non-surgical treatment does not necessarily make a structural tear disappear; it aims to make the shoulder comfortable, strong and capable by improving the tissues and movement around it.
- Modify painful overhead and heavy tasks temporarily while maintaining comfortable movement.
- Use short-term pain relief or anti-inflammatory medication only when medically appropriate.
- Address sleep position, work height, lifting technique and sudden changes in training load.
- Follow progressive physiotherapy rather than relying on prolonged rest or passive treatment alone.
Progress is reviewed through pain, sleep, movement and strength. Increasing weakness, repeated loss of function or symptoms that remain unacceptable after a consistent programme should prompt reassessment of the diagnosis and treatment goals.
Exercise and Rehabilitation
Exercise is adapted to tear pattern, irritability and existing movement. Early work may use supported range-of-motion and low-load isometric contractions to keep the shoulder active without provoking a prolonged flare. Loading then progresses as the shoulder tolerates it.
- Restore comfortable shoulder and upper-back movement while avoiding forced painful ranges.
- Strengthen the remaining rotator cuff, deltoid and shoulder-blade muscles with controlled resistance.
- Develop endurance and control during reaching, carrying and gradual overhead tasks.
- Reintroduce work or sport movements with progressive load, speed and repetition.
Mild discomfort that settles soon after exercise can be acceptable, but clear next-day worsening suggests that the dose was too high. Sudden new weakness or loss of movement is not a normal training response and needs review.
Injections and Biologic Treatments
A corticosteroid injection into the subacromial space may reduce pain for a limited period and help selected patients participate in rehabilitation. It does not reconnect a torn tendon. Repeated injections are approached cautiously because symptom relief can mask excessive loading and corticosteroid exposure may affect tendon quality.
Platelet-rich plasma and other biologic injections are being studied for rotator cuff disease, but their role varies with the exact tendon problem and evidence remains uncertain for established full-thickness tears. They should not be presented as guaranteed tendon regeneration or as a substitute for repair when a surgically relevant tear is identified.
When Is Rotator Cuff Surgery Needed?
Surgery may be considered for an acute traumatic full-thickness tear with meaningful weakness, a tear that enlarges with declining function, or persistent pain and disability despite an appropriate non-surgical programme. Activity demands, tendon retraction, muscle quality, associated injuries, general health and willingness to complete postoperative rehabilitation all influence the decision.
Most repairs are performed using shoulder arthroscopy, with anchors and sutures used to reattach suitable tendon to bone. The rotator cuff repair surgery guide explains preparation, repair techniques and postoperative protection in detail. Large chronic tears that cannot be mobilised may require a different reconstruction or, in selected arthritic shoulders, another surgical strategy.
Recovery Time and What to Expect
With non-surgical care, improvement usually develops over weeks to months as load tolerance and strength change. Recovery is influenced by tear size, symptom duration, occupation, sleep, general health and consistency with exercise. Some people retain a structural tear yet achieve satisfactory comfort and daily function.
Recovery after repair is longer because tendon-to-bone healing must be protected before strength is rebuilt. A sling is commonly used early, followed by staged passive movement, active movement and strengthening according to the repair. Heavy work and unrestricted overhead sport take several months and are guided by healing, strength and control rather than pain relief alone.
Can Rotator Cuff Tears Be Prevented?
Not every tear can be prevented, especially one caused by a fall or age-related tendon change. Modifiable risks can still be reduced by preparing the shoulder for the loads it must handle. Prevention is an ongoing training approach rather than a single stretch or brace.
- Increase overhead work and throwing volume gradually, with recovery between demanding sessions.
- Maintain rotator cuff, shoulder-blade, trunk and lower-body strength appropriate to the activity.
- Adjust work height and lifting technique instead of repeatedly handling load at the limit of reach.
- Rehabilitate a previous shoulder injury fully before returning to unrestricted overhead demand.
When Should You See a Doctor?
Arrange an assessment if shoulder pain persists, disturbs sleep, causes progressive weakness or repeatedly limits work and daily tasks. Seek prompt care after trauma if the arm cannot be raised, the shoulder looks deformed or pain is severe. New numbness, a cold or pale hand, fever or rapidly increasing swelling requires urgent medical attention.
For an overview of related conditions and treatments, visit the Shoulder page. To connect examination and imaging findings with your activity goals, use the Contact page to request an individual assessment.