Subacromial bursitis

What is subacromial bursitis?

Bursae are thin-walled, fluid-filled buffers that reduce friction between tissues. The subacromial-subdeltoid bursa lies between the rotator cuff and the acromion or the deltoid muscle. It allows the tendons to glide smoothly when raising the arms.

If there is mechanical irritation or overload, the bursa can swell and become inflamed. This leads to pain - especially when lifting the arm to the side or overhead - and often to pressure pain on the side of the shoulder.

• Location: under the acromion, above the rotator cuff
• Function: friction reduction, plain bearing
• Neighborhood: Supraspinatus tendon, acromion, AC joint, deltoid muscle

Typical symptoms

• Lateral shoulder pain, often radiating to the upper arm
• Pain when raising the arm (painful arc, usually between 60-120 degrees)
• Pressure pain over the large humerus and under the acromion
• Night pain, especially when lying on the affected side
• Restriction of movement due to pain inhibition, feeling of friction/“trapping”
• Occasionally a feeling of warmth or painful swelling; visible redness is rare

The intensity varies: from stress-related complaints to permanent pain at rest. An acute course (e.g. after overuse) differs from chronic, recurring bursitis, which is often associated with tendon irritation.

Causes and risk factors

Bursitis usually occurs due to an imbalance in the load and resilience of the shoulder joint. Several factors often work together:

• Mechanical tightness (“impingement”): congenital acromion shape, bone spurs on the AC joint
• Rotator cuff tendon irritation (e.g. supraspinatus tendinopathy) and calcium deposits
• Overhead stress in work and sports (painters, crafts, swimming, tennis, volleyball, CrossFit)
• Poor posture and scapular dyskinesia (unfavorable shoulder blade guidance)
• Acute overload: unusual gardening, renovation, heavy lifting
• Concomitant diseases: diabetes, thyroid diseases, rheumatic diseases, gout
• Age over 40 years, previous shoulder injuries, tobacco use

Infectious bursitis, which can be accompanied by fever, significant redness and pronounced swelling, is rarer. In these cases, prompt medical evaluation is important.

Diagnosis in practice

The diagnosis begins with a targeted anamnesis (onset of pain, stress, night/rest pain) and a structured clinical examination. A painful arch during abduction and tenderness in the subacromial area are typical.

• Clinical tests: Painful arc, Neer, Hawkins-Kennedy signs (indication of subacromial obstruction)
• Sonography (ultrasound): Depiction of bursal swelling, fluid, thickening; dynamic assessment when raising the arm
• X-ray: assessment of acromion shape, bone spurs and calcifications
• MRI: If the findings are unclear, persistent symptoms or suspected tendon damage
• Diagnostic injection test: Temporary pain reduction after subacromial local anesthetic injection supports the diagnosis
• Laboratory/inflammatory values: only if infection or systemic disease is suspected

The decisive factor is whether the bursitis is isolated or is linked to tendinopathy or partial tear of the rotator cuff - this influences treatment planning.

Differentiation from other shoulder diseases

• Rotator cuff tendinopathies or tears
• Calcified shoulder (tendinitis calcarea)
• Biceps tendonitis (long biceps tendon, LBS)
• AC joint osteoarthritis
• Adhesive capsulitis (frozen shoulder)
• Cervical radiculopathy (cervical spine)
• Rare: septic bursitis, inflammatory rheumatic causes

Conservative treatment: the standard

In the vast majority of cases, structured, conservative therapy is sufficient. The aim is to reduce pain, calm inflammation, restore shoulder function and sustainable resilience.

• Advice and activity control: Initially reduce overhead and pain triggers, gradually rebuild activities
• Cooling in the acute phase (10–15 minutes, 2–3 times daily, pay attention to skin protection)
• Anti-inflammatory measures: topical anti-inflammatory drugs; systemic pain/inflammatory inhibitors for a short period of time and after individual testing
• Short-term immobilization only if necessary, then early functional mobilization
• Physiotherapy with a focus on scapula control, rotator cuff strengthening and mobility
• Posture and ergonomics advice (workplace, sports technology, everyday movements)

An individual stress plan is important. Maximum loads that are too early can prolong the bursitis; too much protection weakens the stabilizing muscles.

Physiotherapy and exercises

Targeted exercise programs are a core component. The exercises are usually carried out with little pain and are progressively increased.

The dosage is based on pain and reaction after exercise. A 24-48 hour feedback window helps to choose the right intensity.

Injections and interventional options

If conservative measures are not effective enough, targeted injections can calm the inflammation and enable more effective physiotherapy.

• Subacromial corticosteroid injection (ultrasound targeted): Evidence for short- to medium-term pain relief; Use cautiously (e.g. 1-3 injections per year), possible side effects are discussed beforehand.
• Local anesthetic diagnostics: can narrow down the source of the pain and support therapy planning.
• Shock wave therapy: primarily relevant for calcific tendinopathy; Limited benefit in isolated bursitis.
• Regenerative procedures (e.g. PRP): currently only supported by limited studies for pure bursitis; can be considered in selected cases with accompanying tendinopathy - as a self-pay service, with information about unclear evidence and variable benefits.

Needle lavage (“barbotage”) targets calcium deposits in tendons and is not a standard treatment for isolated bursitis.

When does an operation make sense?

Surgery is rarely required for subacromial bursitis. In randomized studies, subacromial decompression (acromioplasty) alone showed no clear advantage over placebo or conservative therapy for nonspecific impingement. Surgical procedures are therefore used cautiously and in a targeted manner.

• Indications can be: structural tightness with mechanical conflict and therapy-resistant symptoms, relevant tendon tears of the rotator cuff that require primary care.
• Arthroscopy: Combination of diagnostic assessment, bursectomy for inflammatory thickened bursa and, if necessary, accompanying measures (e.g. rotator cuff reconstruction) - according to strict indications.
• Decision after at least several months of consistent conservative therapy and individual, well-founded information.

Healing process and prognosis

Many sufferers report significant improvement within 6-12 weeks if loads are adjusted and exercises are carried out regularly. If there are accompanying tendon problems or chronic conditions, recovery can take longer.

• Early phase: pain reduction, anti-inflammatory measures, technical fine-tuning in everyday life
• Development phase: Strength and coordination of the rotator cuff and shoulder blade muscles
• Return to full exertion: gradually, with a focus on quality of movement
• Relapse prevention: regular maintenance program, ergonomic adjustments

Complete freedom from symptoms cannot be guaranteed; The goal is a stable functional improvement that meets individual requirements.

Prevention and everyday tips

• Warm up and technique training before overhead activities
• Regular strengthening of the rotator cuff and scapula stabilizers
• Varying stress, breaks and micro-movements in everyday work
• Ergonomic optimization: monitor height, armrests, tool guidance
• Maintain thoracic mobility, change posture regularly
• Gradual increase after training breaks (10–20% rule)

When should you seek medical advice?

• Acute severe pain after trauma or audible tearing
• Severe pain at night and at rest despite rest
• Fever, redness, significant swelling or overheating of the shoulder
• Persistent dysfunction over several weeks
• Numbness, tingling or loss of strength in the arm
• Previous illnesses such as diabetes or rheumatism and increasing shoulder problems

What you can do yourself

• Cold applications in the acute phase, later if necessary heat to relax muscles
• Sleep on your back with a pillow under your forearm for relief
• Gentle pendulum exercises several times a day without working into sharp pain
• Adapt everyday activities: carry heavy loads close to your body, shorten overhead phases
• If necessary, over-the-counter painkillers only for a short time and according to the package leaflet; Be aware of interactions and previous illnesses

Special situations: sport, job, age

Therapy and stress build-up are based on the individual profile. Differences mainly concern the speed of progression and the specific technical components.

• Overhead athletes: focus on technique, scapulothoracic control, eccentric cuff training; Return-to-sport according to functional and stress criteria.
• Craft/industry: ergonomic aids (lifting aids, work rotation), training in load control and break management.
• Older people: same principle but gentler progression; The focus is on fall prevention, coordination and everyday function.
• Diabetes/endocrine diseases: Special features regarding injections (e.g. blood sugar), close coordination.

Evidence and guidelines

Current guidelines for subacromial pain syndrome primarily recommend conservative therapy with exercise programs, education and temporary medication support. Ultrasound-targeted injections can help in the short term, but should be used in moderation. Routine surgical decompression without accompanying structural pathology is viewed critically due to limited evidence of additional benefit.

Your shoulder in good hands – in Hamburg

In our orthopedic practice at Dorotheenstrasse 48, 22301 Hamburg, you will receive a structured, differentiated assessment of your shoulder pain and an individual, everyday therapy concept. We work closely with qualified physiotherapists in Hamburg and accompany you from acute management to the return to stress.