Bursitis of the Shoulder – A Comprehensive Guide
Overview
Bursitis of the shoulder occurs when the subacromial–subdeltoid bursa— a small fluid‑filled sac that cushions the rotator‑cuff tendons from the overlying bone— becomes inflamed. The condition is also called subacromial bursitis or shoulder impingement syndrome when the inflammation is part of a broader impingement process.
- Who it affects: Adults between 40 and 70 years are most commonly diagnosed, but younger athletes, manual‑labor workers, and people with inflammatory diseases can develop it as well.
- Prevalence: Shoulder pain accounts for about 15 % of all musculoskeletal complaints seen in primary‑care settings, and bursitis is responsible for roughly 10‑20 % of those cases (Mayo Clinic, 2023). In the United States, an estimated 1.3 million physician visits per year are coded for shoulder bursitis.
- Why it matters: Persistent shoulder pain can limit reach, overhead activities, and quality of life, and may predispose to rotator‑cuff tears if left untreated.
Symptoms
Symptoms develop gradually or after a specific injury. The most common manifestations include:
- Pain at the front or top of the shoulder: Often described as a dull ache that becomes sharp with certain movements.
- Pain worsens with overhead activity: Lifting, reaching, or throwing can exacerbate discomfort.
- Night pain: Difficulty sleeping on the affected side is frequent.
- Limited range of motion (ROM): Raising the arm (abduction) beyond 90° may be painful or restricted.
- Tenderness to palpation: Pressing on the lateral aspect of the acromion or the deltoid region reproduces pain.
- Swelling or a “boggy” feeling: In acute cases, visible swelling may be present.
- Clicking or snapping sensation: Known as “catch” due to the inflamed bursa rubbing against bone.
- Weakness: Often secondary to pain rather than true muscle loss.
Causes and Risk Factors
Primary causes
- Repetitive overhead motion: Activities such as painting, swimming, tennis, or manual labor strain the subacromial space.
- Trauma: A fall onto the shoulder or a direct blow can irritate the bursa.
- Shoulder impingement: Narrowing of the subacromial space (often due to bone spurs or a high‑arched acromion) compresses the bursa.
- Systemic inflammatory conditions: Rheumatoid arthritis, gout, or septic infections can involve the bursa.
Risk factors
- Age > 40 years
- Male gender (slightly higher incidence)
- Occupations requiring repetitive arm elevation (e.g., carpenters, electricians)
- Athletic pursuits with overhead motions (e.g., baseball pitchers, volleyball players)
- Poor posture leading to rounding of shoulders
- Previous shoulder injuries or rotator‑cuff tendinopathy
- Systemic diseases such as diabetes, rheumatoid arthritis, or gout
- Use of certain medications (e.g., corticosteroids) that may weaken tendon integrity when used repeatedly
Diagnosis
A careful history and physical exam are the cornerstones of diagnosis. The clinician will typically assess:
- Onset, location, and aggravating/relieving factors of pain
- Range of motion (active and passive)
- Strength testing of the rotator‑cuff muscles
- Special tests such as the Neer and Hawkins‑Kennedy impingement maneuvers
- Palpation for tenderness over the subacromial area
Imaging and other tests
| Test | Purpose | Typical Findings |
|---|---|---|
| Plain X‑ray | Rule out fractures, arthritis, or bone spurs | May show acromial shape or calcium deposits |
| Ultrasound | Dynamic view of the bursa, fluid collection | Hypoechoic (dark) fluid in the subacromial space; thickened bursal walls |
| MRI (Magnetic Resonance Imaging) | Gold standard for soft‑tissue detail | Fluid‑filled bursa, adjacent tendon inflammation, and possible rotator‑cuff tear |
| Joint aspiration (rare) | Obtain fluid for analysis if infection is suspected | Purulent fluid, positive Gram stain or culture |
Laboratory tests (CBC, ESR, CRP) are generally ordered only when infection or systemic inflammatory disease is a concern.
Treatment Options
The goal of treatment is to reduce inflammation, restore motion, and prevent recurrence. Most cases respond to non‑surgical measures.
Medications
- Non‑steroidal anti‑inflammatory drugs (NSAIDs): Ibuprofen 400‑600 mg q6‑8 h or naproxen 250‑500 mg bid. Provide pain relief and reduce inflammation (CDC, 2022).
- Acetaminophen: For patients who cannot tolerate NSAIDs.
- Corticosteroid injection: 1‑2 mL of 40 mg/mL triamcinolone into the subacromial space under ultrasound guidance. Offers rapid pain control; limit to ≤ 3 injections per year to avoid tendon weakening.
- Topical NSAIDs: May be useful for mild cases with minimal systemic side‑effects.
Physical Therapy & Rehabilitation
- Phase 1 – Pain control: Gentle pendulum exercises, passive ROM, and ice 15 min 3–4×/day.
- Phase 2 – Restoring motion: Active‑assisted and active ROM, scapular‑stabilization drills, and posterior capsule stretches.
- Phase 3 – Strengthening: Isometric rotator‑cuff work progressing to isotonic exercises with resistance bands or light weights.
- Therapist‑guided proprioception and functional training for overhead activities.
Procedural Interventions
- Ultrasound‑guided aspiration & injection: Removes excess fluid and delivers corticosteroid directly.
- Barbotage (needling) or platelet‑rich plasma (PRP): Emerging options for chronic cases; evidence still evolving.
- Arthroscopic bursectomy: Surgical removal of the inflamed bursa is considered when conservative care fails after 3–6 months.
Lifestyle & Home Measures
- Ice packs for 15 min at the first sign of flare‑up.
- Activity modification – avoid overhead work for 1‑2 weeks.
- Ergonomic adjustments (e.g., workstation height, proper lifting technique).
- Postural training to keep shoulders retracted and depressed.
Living with Bursitis of the Shoulder
Even after the acute episode resolves, many people experience intermittent discomfort. Practical daily‑management tips include:
- Scheduled stretching: 5‑minute shoulder‑mobility routine each morning.
- Strengthen scapular stabilizers: Rowing motions, wall angels, and Y‑T‑W exercises 3 times per week.
- Heat before activity, ice after: Warm a moist towel for 10 minutes to loosen tissues before exercising, then cool with ice afterward.
- Use pain‑relief topical gels: Menthol or diclofenac creams can be applied before activity when mild soreness is anticipated.
- Weight management: Reducing excess body weight decreases overall inflammatory load.
- Monitor for red‑flag symptoms: Sudden increase in swelling, fever, or a “popping” sensation warrants prompt re‑evaluation.
Prevention
Most cases are preventable with simple habit changes:
- Warm‑up properly: 5‑10 minutes of dynamic arm circles and light thoracic spine mobility before sports or manual work.
- Strengthen rotator‑cuff and scapular muscles: Regular resistance training (2–3 sessions per week) maintains a protective muscular envelope.
- Maintain good posture: Keep the scapulae down and back; consider ergonomic chairs and monitor height.
- Take frequent micro‑breaks: For jobs requiring overhead reach, pause every 20 minutes to lower arms and gently stretch.
- Avoid repetitive high‑impact activity without rest: Follow the 10‑minute “rule”: after 10 minutes of continuous overhead motion, rest for 30 seconds to a minute.
- Address systemic conditions: Keep diabetes, gout, and rheumatoid arthritis well‑controlled under a physician’s guidance.
Complications
If left untreated, shoulder bursitis can lead to:
- Chronic pain and functional loss: Persistent limitation in elevation may affect daily tasks.
- Rotator‑cuff tendon degeneration or tear: Ongoing impingement damages the tendons.
- Calcific bursitis: Calcium deposits form within the bursa, causing severe pain that may require needling or surgical removal.
- Adhesive capsulitis (frozen shoulder): Scar tissue builds up, further restricting motion.
- Septic bursitis: Bacterial infection of the bursa can result in fever, rapid swelling, and may require antibiotics or surgical drainage.
When to Seek Emergency Care
Call 911 or go to the nearest emergency department if you notice any of the following:
- Sudden, severe shoulder pain that spikes within minutes.
- Rapid swelling accompanied by warmth, redness, or fever (possible infection).
- Loss of all shoulder movement or an inability to lift the arm.
- Sudden numbness or tingling radiating down the arm (possible nerve compression).
- Visible deformity or a “popping” sound followed by intense pain (suggests fracture or dislocation).
These signs may indicate a septic bursitis, fracture, or another urgent orthopedic condition that requires immediate medical attention.
References
- Mayo Clinic. “Shoulder Bursitis.” Updated 2023. https://www.mayoclinic.org
- Centers for Disease Control and Prevention. “NSAID Use and Safety.” 2022. https://www.cdc.gov
- National Institute of Arthritis and Musculoskeletal and Skin Diseases. “Bursitis.” 2022. https://www.niams.nih.gov
- American Academy of Orthopaedic Surgeons. “Shoulder Impingement and Bursitis.” Clinical Practice Guideline, 2021.
- Cleveland Clinic. “Shoulder Bursitis Treatment Options.” 2023. https://my.clevelandclinic.org
- World Health Organization. “Guidelines for the Management of Musculoskeletal Pain.” 2020.