Shoulder Impingement Syndrome Treatment San Diego CA

Shoulder impingement syndrome is one of the most common causes of shoulder pain, particularly in active adults and those who perform repetitive overhead activities. It occurs when the soft tissues running through the subacromial space — primarily the rotator cuff tendons and the bursa — become pinched or compressed between the top of the humerus and the underside of the acromion or the coracoacromial ligament during arm elevation. Over time, repeated compression may lead to tendon inflammation, bursitis, and in some cases partial or complete rotator cuff tears.

At Grossmont Orthopedic Medical Group, our fellowship-trained shoulder specialists evaluate each patient thoroughly to identify the underlying mechanical and structural factors contributing to impingement. A personalized treatment plan — beginning with the least invasive options — is developed with the goal of returning patients to pain-free function.

What Is Shoulder Impingement Syndrome?

The subacromial space is a narrow corridor between the top of the arm bone (humerus) and the acromion — the bony roof of the shoulder — through which the rotator cuff tendons and the subacromial bursa pass. When this space narrows due to structural changes, inflammation, or muscle imbalance, normal shoulder movement may cause the tendons and bursa to be repeatedly compressed against the acromion or the coracoacromial ligament.

Impingement may be classified as primary (caused by structural narrowing from bone spurs or a hooked acromion) or secondary (caused by dynamic instability, rotator cuff weakness, or scapular dyskinesis that allows the humeral head to ride upward). Both types may respond well to targeted treatment. Because impingement frequently coincides with rotator cuff pathology — including partial tears and biceps tendon irritation — a thorough evaluation is important to guide the right treatment path.

Symptoms

The hallmark of shoulder impingement is pain during arm elevation. Symptoms may include:

Pain with overhead reaching, throwing, or lifting
A painful arc — discomfort between roughly 60 and 120 degrees of arm elevation
Difficulty reaching behind the back (e.g., fastening clothing, tucking in a shirt)
Night pain, particularly when lying on the affected shoulder
Aching at the front and outer side of the shoulder
Weakness or reduced endurance with overhead activities

Symptoms that persist at rest, are accompanied by significant weakness, or worsen rapidly may indicate an associated rotator cuff tear, which often coincides with impingement and warrants prompt evaluation.

Causes & Contributing Factors

Several structural and functional factors may contribute to subacromial impingement:

Acromial bone spurs — osteophytes on the undersurface of the acromion may directly narrow the subacromial space
Hooked (Type III) acromion — a curved or hooked acromial shape may leave less room for the rotator cuff during arm elevation
Subacromial bursitis — inflammation of the bursa itself may cause it to swell and further compress the space
Rotator cuff weakness — if the cuff muscles are weak, the humeral head may migrate upward and mechanically impinge
Scapular dyskinesis — poor scapular positioning reduces the effective subacromial space during arm elevation
Poor posture — forward head and rounded shoulder posture are associated with tightening of the anterior capsule and reduced subacromial clearance
Repetitive overhead activity — painting, swimming, throwing sports, and overhead occupational work may accelerate tendon irritation

Diagnosis

A comprehensive evaluation at GOMG typically begins with a detailed history and physical examination. Provocative tests such as the Neer sign, Hawkins-Kennedy test, and empty can test help localize the source of impingement and assess rotator cuff integrity. A diagnostic subacromial injection with local anesthetic — which may provide temporary relief if impingement is the primary pain generator — can also help confirm the diagnosis.

Imaging is an important part of the workup. X-rays may reveal acromial morphology, bone spurs, and the degree of subacromial space narrowing. MRI or MR arthrography can identify associated rotator cuff pathology, bursitis, and the condition of the biceps tendon — helping to guide the appropriate treatment pathway.

Treatment Options

Treatment for shoulder impingement is typically stepwise, beginning with non-surgical approaches and progressing to surgical intervention only when conservative measures have not provided sufficient relief after an appropriate trial period.

Conservative Treatment

Physical therapy — a structured program focusing on rotator cuff strengthening, scapular stabilization, posterior capsule stretching, and postural correction may be the most effective single intervention for impingement
NSAIDs — oral anti-inflammatory medications may help reduce pain and bursal swelling, making physical therapy more effective
Activity modification — temporarily avoiding overhead and provocative activities allows acutely inflamed structures to settle
Subacromial corticosteroid injection — a precisely placed injection of corticosteroid into the subacromial bursa may provide significant short- to medium-term pain relief and facilitate participation in physical therapy
Ice and topical anti-inflammatories — adjuncts that may help manage day-to-day discomfort during the recovery period

When Surgery May Help

For patients who have completed a diligent course of conservative treatment — typically three to six months — without adequate improvement, arthroscopic subacromial decompression may be recommended.

Arthroscopic subacromial decompression (acromioplasty) — using a small camera and miniature instruments, the surgeon removes bone spurs from the undersurface of the acromion and releases the coracoacromial ligament, enlarging the subacromial space
Bursectomy — thickened, inflamed bursa tissue may be removed at the same time to further reduce impingement
Concurrent rotator cuff repair — because impingement and rotator cuff pathology frequently coexist, any partial or full-thickness cuff tears identified arthroscopically may be addressed during the same procedure

Arthroscopic decompression is performed as an outpatient procedure. Most patients use a sling for comfort for the first one to two weeks and may return to desk work within days. Full recovery and return to sport or heavy labor typically takes three to six months.

Frequently Asked Questions

What causes shoulder impingement? +

Shoulder impingement may occur when the rotator cuff tendons and bursa become compressed beneath the acromion bone and coracoacromial ligament during arm elevation. Contributing factors can include bone spurs on the underside of the acromion, a hooked (Type III) acromial shape, subacromial bursitis, poor posture, rotator cuff muscle weakness, and repetitive overhead activity. Any combination of these factors may narrow the subacromial space and irritate the tendons.

Can shoulder impingement be treated without surgery? +

Many patients with shoulder impingement respond well to non-surgical care. A structured program of physical therapy targeting rotator cuff strengthening and scapular stabilization, combined with anti-inflammatory medications and activity modification, may significantly reduce pain. Subacromial corticosteroid injections can also provide relief. Surgery is generally considered only when several months of dedicated conservative treatment have not produced adequate improvement.

What is subacromial decompression? +

Subacromial decompression, also called acromioplasty, is an arthroscopic procedure in which the surgeon uses a small camera and instruments to remove bone spurs from the underside of the acromion and release the coracoacromial ligament. This may enlarge the subacromial space and relieve pressure on the rotator cuff tendons. It is typically performed as an outpatient procedure and is often combined with treatment of any associated rotator cuff pathology found at the time of surgery.

How long does shoulder impingement take to heal? +

Recovery time varies considerably depending on severity and treatment approach. Patients following a conservative program may begin to notice improvement within 6 to 12 weeks, though full resolution of symptoms can take 3 to 6 months or longer. After arthroscopic subacromial decompression, most patients are able to return to light activity within a few weeks and full activity within 3 to 6 months, depending on whether additional work was performed at the time of surgery.

Our Shoulder Specialists

Shoulder impingement and subacromial decompression are treated by our fellowship-trained shoulder and sports medicine surgeons.

Shoulder Specialist

Dr. Benjamin DuBois, MD

Fellowship-Trained, University of Washington

100% shoulder-focused practice
5,000+ shoulder procedures performed
Newsweek Top 10 Doctor, Shoulder Surgery USA 2025
First in San Diego to use Match Point pre-op planning

View Full Profile

Sports Medicine & Arthroscopy

Dr. Scott A. Hacker, MD, MS

Fellowship-Trained, Steadman-Hawkins Clinic, Vail CO

U.S. Olympic Team Surgeon
Arthroscopic shoulder, knee, and hip surgery
Rotator cuff repair, labral repair, and impingement
Fellowship-trained at the world-renowned Steadman-Hawkins Clinic