Shoulder Impingement

Shoulder impingement is pain caused by tendons and a cushioning sac being rubbed or pinched beneath the bony roof of the shoulder as the arm rises. It is one of the commonest reasons for shoulder pain in adults. This page covers what causes it, how to tell it from look-alike problems, how treatment works and when treatment in turkey is worth discussing.

What is shoulder impingement?

Between the top of the upper arm bone and the acromion (the bony tip of the shoulder blade) lies a small gap of roughly 1 cm. The supraspinatus tendon and a fluid-filled bursa pass through it. When the gap narrows, or the tendon swells, they catch on the bone above and become inflamed.

Doctors now often prefer the label subacromial pain syndrome, because the pinching may be only part of the story. Tendon overload, bursal irritation and altered shoulder-blade movement all play a role. You may also see the term impingement syndrome of the shoulder in older reports.

Who gets shoulder impingement?

Most patients are between 30 and 60. It appears in overhead workers, swimmers, racket-sport players, weightlifters and people with long hours at a desk. Swimmer's shoulder is the same problem in people who log many training kilometres. Poor posture, weak shoulder-blade muscles and sudden changes in training volume all raise the risk.

How serious is shoulder impingement?

It is rarely harmful to general health, and many cases clear in a few months. The risk is that repeated irritation weakens a tendon, so prolonged shoulder impingement can lead to a partial tear of the cuff. A shoulder that hurts for longer than 6 weeks deserves a proper assessment.

How this page is organised

We start with the anatomy, symptoms and causes, followed by types, diagnosis and look-alikes. Treatment sections move from rest and rehabilitation to injections, surgery and abroad options. We close with complications, prevention, outlook and frequently asked questions. The shoulder section adds general background.

The shoulder fits a large range of movement into a compact space, and shoulder impingement happens where that space is tightest. The pinch point is the subacromial space, which sits just under the acromion and above the ball of the joint. Understanding how this space opens and closes explains most of the symptoms.

What is in the subacromial space?

The roof is formed by the acromion and the coracoacromial ligament. The floor is the humeral head covered by the rotator cuff tendons, mainly the supraspinatus. Between them lies the subacromial bursa, a thin sac that lets the tendon slide smoothly beneath the roof. The long head of the biceps tendon runs close by.

When you lift the arm sideways, the humeral head must glide down and rotate while the shoulder blade tilts upward. This partnership is called scapulohumeral rhythm. Done well, the space stays open and the tendon is never trapped.

What shapes of acromion are described?

Surgeons describe three acromion shapes: flat (type I), curved (type II) and hooked (type III). Hooked shapes narrow the space and are more often linked with cuff tears. But many people with a hook have no pain, so the bone alone does not explain symptoms. Bone spurs from the coracoacromial ligament can add to crowding with age.

What changes in shoulder impingement?

The bursa becomes inflamed and thick. The tendon may swell, develop small areas of degeneration (tendinopathy) and become tender. Weak or poorly timed shoulder-blade muscles, a tight back of the shoulder capsule, or a stiff upper back can all stop the acromion rising out of the way. The tendon then catches each time the arm lifts, which keeps the irritation going.

If the process continues for months, the tendon can fray and form a partial tear, which is described on our rotator cuff tear page.

Doctors describe shoulder impingement in several ways, depending on where the pinching occurs and what is driving it. These labels matter because primary subacromial problems and internal problems respond to different treatments. Most patients have the subacromial type.

What is subacromial (external) impingement?

This is the typical form. The tendon and bursa are compressed against the underside of the acromion. Pain is on the front and side of the shoulder with overhead lifting. Treatment focuses on exercise, activity changes and, rarely, surgery to create more room.

What is internal impingement?

Internal impingement occurs in throwers and overhead athletes. In extreme cocking positions, the undersurface of the cuff pinches against the back rim of the socket. Pain is felt at the back of the shoulder during throwing. Management involves technique, rotation strength and shoulder mobility, and surgery is reserved for specific tears.

What is subcoracoid impingement?

Here the subscapularis tendon is pinched between the humeral head and the coracoid process at the front of the shoulder. Pain appears with reaching across the body. It is less common and is diagnosed with specific examination tests and imaging.

How are stages described?

A traditional three-stage model, introduced by Neer, is still referred to by surgeons. It is a guide and does not replace a personal assessment.

Why do the types matter?

Treating internal impingement as subacromial pain, for example, may lead to unnecessary bone-shaving. A clear label ensures that advice, exercise and any procedure address the real mechanism.

Shoulder impingement is diagnosed clinically: your story and a hands-on examination matter more than any scan. Imaging is used to rule out other problems, such as a rotator cuff tear, calcification or arthritis. A careful diagnosis keeps you from having surgery for a pain pattern that exercise can solve.

What does the clinician ask?

You will be asked where it hurts, which movements trigger it, how long it has lasted, and how nights are. Work tasks, sports and recent changes in training are explored. The clinician will want to know about neck pain, numbness, previous injections and any injury, since these point to different diagnoses.

How is the shoulder examined?

The clinician looks at posture and shoulder-blade movement, compares both arms and checks range of movement. Special tests include the Neer and Hawkins-Kennedy manoeuvres, which squeeze the subacromial tissues, and the painful arc test. Resisted lifting and rotation test the cuff, and the clinician looks for pain-limited weakness versus true weakness.

The neck is screened as well. If symptoms are reproduced by neck movement or there is tingling in the hand, a neck source may be at play.

When is imaging needed?

Not everyone needs a scan. An X-ray is useful when pain is persistent, after injury or when arthritis is suspected, and shows acromion shape, spurs and calcium deposits. Ultrasound can show bursal thickening, tendon swelling and many tears, and can be used dynamically. MRI is reserved for cases when a tear is suspected, treatment has failed or surgery is being planned.

What should you bring to a remote review?

Prepare any X-ray, ultrasound or MRI images and reports, a list of treatments tried with dates, injection history, and notes from your physiotherapist. A short written description of the movements that hurt is helpful. The medical record review guide explains the process, and you can begin with a free case review.

Exercise-based rehabilitation is the first and most reliable treatment for shoulder impingement, and most people improve without an operation. Studies in people with subacromial pain suggest that a supervised programme performs about as well as surgery over 1 to 2 years. Treatment is usually given in stages over 3 to 6 months.

What is the plan in the first few weeks?

Begin by calming the shoulder. Avoid the positions that spike pain, such as heavy overhead lifting, and keep the arm moving in the comfortable range. Relative rest is helpful, complete rest is not. Pain relief and ice or heat can make movement easier while the irritation settles.

How does physiotherapy work for shoulder impingement?

The therapist assesses posture, shoulder-blade control and strength, then builds a graded programme. Typical goals include stretching the back of the shoulder, restoring thoracic extension, retraining the serratus anterior and lower trapezius, and strengthening the rotator cuff. Sessions are commonly weekly for 6 to 12 weeks, with home exercises every day. Many people see clear improvement by 6 to 8 weeks.

Which medicines help?

Paracetamol and short courses of non-steroidal anti-inflammatory drugs (NSAIDs) can ease pain and allow exercise. Topical gels are an alternative for those who cannot take tablets. Your doctor can advise on duration and on interactions, especially if you take anticoagulants or have stomach, kidney or heart problems.

When is an injection suitable?

A corticosteroid injection into the subacromial bursa can reduce pain for several weeks. It does not fix the cause but opens a window for exercise. Doctors usually limit the number to 1 to 3, spaced weeks apart, because repeated injections may weaken the tendon. Image guidance can improve accuracy.

What else is offered?

Extracorporeal shockwave therapy is mostly used for calcific tendinitis. Taping, manual therapy and acupuncture might provide short-term relief but have limited evidence of lasting benefit. Platelet-rich plasma is sometimes offered, though evidence is mixed, so ask for the reasoning behind it.

What does the evidence say?

Large randomised trials, such as the UK CSAW study, compared arthroscopic decompression with diagnostic arthroscopy and with no surgery. Both surgical groups did slightly better than no treatment, but the decompression added no meaningful benefit over the placebo-like diagnostic arthroscopy. This is why many guidelines put surgery behind a full rehabilitation trial.

How long should you persist?

Give a structured programme at least 3 months and ideally 6 months if you are improving. If you are no better by then, or you worsen, ask for a repeat assessment and consider imaging.

Surgery for shoulder impingement is an option for a minority whose pain persists after proper rehabilitation, and for those who have a tendon tear that needs repair. The procedures are done through keyhole incisions, and none replaces the need for rehabilitation. This section compares what each offers.

Subacromial decompression

In subacromial decompression, the surgeon inspects the joint with an arthroscope, removes the inflamed bursa, and may shave the underside of the acromion and release the coracoacromial ligament to widen the space. It is performed as a day case, taking 30 to 60 minutes. It is part of shoulder arthroscopy, and you can learn about subacromial decompression in turkey on the page shoulder arthroscopy in turkey. The shoulder arthroscopy cost guide explains what a price includes.

Given the trial evidence, surgeons today are selective. It is most often used when bone spurs are clearly compressing the tendon, or alongside another procedure such as biceps treatment, AC joint resection or cuff repair.

Rotator cuff repair

If imaging or arthroscopy shows a significant tendon tear, a rotator cuff repair reattaches the tendon to bone with small anchors. The decompression step may be included to protect the repair. See rotator cuff repair in turkey and the rotator cuff repair cost guide.

Other procedures sometimes combined

• Biceps tenotomy or tenodesis: relieves pain from an irritated long head of biceps.
• Distal clavicle excision: removes arthritic bone at the AC joint when it contributes to pain.
• Calcific deposit removal: clears a painful calcium deposit when it does not respond to other measures.
• Capsular release: loosens a tight capsule when stiffness accompanies impingement.

How do the options compare?

You can lower the risk of shoulder impingement, or its recurrence, by keeping shoulder-blade muscles strong, managing load and avoiding long spells in poor posture. Prevention is practical rather than complicated. These habits help both people who have never had symptoms and those who are recovering.

How can you prevent shoulder impingement?

Include rotator cuff and shoulder-blade strengthening in your gym or sport routine at least 2 times a week. Warm up before overhead sport, and increase training volume gradually, by no more than about 10% a week. Balance pressing exercises with pulling exercises such as rows to avoid a rounded shoulder posture.

What workplace changes help?

Raise screens to eye level, keep the keyboard near and support the forearms. For overhead work, use platforms, extension poles or tools that avoid long reaches above shoulder height. Alternate tasks and take short breaks every 30 to 45 minutes to move the arms and upper back.

What about sport-specific advice?

Swimmers can work on body roll and breathing on both sides to reduce repeated strain, and ask a coach to check stroke technique. Tennis and throwing athletes should review serving and throwing mechanics. Weightlifters should avoid behind-the-neck presses and wide-grip bench positions if they trigger pain.

What cannot be prevented?

Ageing of tendons and the natural shape of your acromion are not changeable. Some people have a family tendency to tendon problems. You can, however, reduce the load on a susceptible shoulder and respond early to pain that lasts beyond 2 weeks.

How do you prevent recurrence?

Continue the key exercises 2 to 3 times each week even after pain settles, and return to sport gradually. If symptoms creep back, return to the earlier stage of the programme and consider a short physiotherapy review rather than waiting for the pain to build.

The outlook for shoulder impingement is good: most people recover with exercise over 3 to 6 months, and many return fully to work and sport. A small minority has lingering pain and goes on to surgery. Your result depends on how early you start rehabilitation and how consistently you keep it up.

What is the natural history?

Mild cases often settle in a few weeks to months, especially when overload is removed. Moderate cases follow a slower path with flare-ups. Without attention, some progress to tendon tears over several years, so repeated or worsening pain should not be ignored.

What is the recovery timeline after non-surgical care?

What is recovery like after surgery?

After arthroscopic decompression alone, most people leave the same day, use a sling for a few days and begin gentle movement quickly. Light work resumes in 1 to 2 weeks and driving in about 1 to 2 weeks if comfortable. Overhead sport or heavy lifting usually returns around 3 months. If a cuff repair is added, the timeline lengthens to 4 to 6 months or more, as with other repairs.

What are the long-term results?

Most people who complete rehabilitation report meaningful improvement in pain and function that lasts. Results of surgery are good for selected patients but not always better than exercise. A few people have symptoms for a year or longer, particularly with associated tendon degeneration or ongoing heavy overhead work.

What helps you do well?

Keep exercising, correct posture and workstation set-up, increase training gradually and book a review if symptoms return. Stay in touch with your team after travel using our follow-up guide.