The shoulder is a ball-and-socket joint formed by the humerus, scapula, and clavicle, supported by muscles, tendons, and ligaments that allow for stability and a wide range of motion. The rotator cuff tendons attach the arm to the shoulder blade and help control movement, but when these tendons become irritated or inflamed from repeated stress, rotator cuff tendinitis can develop.
As inflammation increases, the space beneath the acromion may narrow, causing the tendons and nearby bursa to become compressed during movement, a condition known as shoulder impingement. Because these conditions affect the same structures and often occur together, they are commonly treated as part of the same disorder.
Treatment typically begins with conservative care to reduce inflammation and restore movement. When symptoms persist despite therapy and other non-surgical treatments, surgical intervention may be considered to relieve pressure on the tendons and improve shoulder function.
Common Causes
Rotator cuff tendinitis and shoulder impingement most often develop from repetitive overhead activity that places ongoing stress on the shoulder. Athletes participating in sports such as baseball, tennis, or swimming, as well as individuals performing repetitive overhead work, are at increased risk of tendon irritation and inflammation.
Age-related changes can also contribute, as tendons gradually lose strength and flexibility over time. Bone spurs along the acromion may further narrow the space within the joint, increasing friction on the tendons. Muscle imbalances, poor posture, and previous shoulder injuries may also play a role in the development of these conditions.
Common Symptoms
Patients with rotator cuff tendinitis or shoulder impingement often experience pain in the front or outer shoulder that may radiate down the arm, particularly with overhead movement or reaching behind the back. Early symptoms may occur only with activity but can progress to more persistent discomfort.
As the condition worsens, patients may notice stiffness, weakness, and reduced range of motion that interferes with daily activities. Night pain is also common, especially when lying on the affected shoulder, and can further impact overall function and comfort.
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Three Common Treatments
Rest and NSAIDs
Reducing activity and using anti-inflammatory medications helps control pain and allows inflamed tissues to recover.
Physical Therapy
Reducing activity and using anti-inflammatory medications helps control pain and allows inflamed tissues to recover.
Cortisone Injection or Surgery
Structured exercises improve mobility, strengthen the shoulder, and correct movement patterns to prevent recurrence.
Frequently Asked Questions
What causes rotator cuff tendinitis and shoulder impingement?
These conditions develop when repetitive overhead motion, overuse, or age-related changes irritate the rotator cuff tendons and surrounding bursa. Over time, swelling can narrow the space beneath the acromion, causing the tendons to become compressed and inflamed. Bone spurs, posture issues, and prior injuries may also contribute, and without treatment, ongoing irritation can increase the risk of tendon damage.
How can rotator cuff tendinitis be treated without surgery?
Non-surgical treatment focuses on reducing inflammation and restoring movement. This includes rest, activity modification, anti-inflammatory medications, and physical therapy to improve flexibility and strengthen supporting muscles. Many patients experience improvement within weeks to months when following a structured therapy program.
When is surgery necessary for shoulder impingement?
Surgery is considered when pain and functional limitations persist, despite several months of conservative care. If imaging reveals significant bursitis, thickened tendons, or bone spurs that do not respond to therapy and injections, a surgeon may recommend arthroscopic decompression to create more space for the rotator cuff. During the procedure, the surgeon inserts a small camera and instruments through tiny incisions to remove the inflamed bursa (bursectomy) and shave down the underside of the acromion (acromioplasty). This relieves pressure on the tendons, allowing them to glide freely. Postoperative therapy is required to restore motion and strength.
How long does recovery take for rotator cuff tendinitis?
Recovery varies depending on severity, but many patients improve within four to six weeks with conservative care, while full recovery may take several months. If surgery is required, rehabilitation progresses in stages, with most patients returning to normal activities within a few months under guided care.