Shoulder Bone Marrow Edema: Causes, Diagnosis and Rehabilitation

For a complete overview, see our comprehensive bone marrow edema guide.

What is shoulder bone marrow edema?

Shoulder bone marrow edema is fluid accumulation within bone marrow of the shoulder joint, presenting as pain and swelling on imaging that indicates underlying bone stress or injury. Shoulder bone marrow edema occurs when excess fluid accumulates within the spongy bone of the shoulder joint structures. The most commonly affected sites are the humeral head (particularly the greater tuberosity) and, less frequently, the glenoid of the scapula.

This condition is relatively common in clinical practice and is often discovered incidentally on MRI scans performed for suspected rotator cuff tears or shoulder instability. It is especially prevalent in athletes who perform repetitive overhead movements, with rates reaching 30-40% in competitive swimmers and volleyball players (Sein et al., 2010).

Shoulder bone marrow edema can occur as an isolated finding or alongside structural damage such as trabecular stress fractures, rotator cuff tendon injuries, glenohumeral instability, or degenerative joint changes.

Causes and risk factors

Traumatic causes

• Direct impact: falls onto the shoulder, collisions in contact sports (rugby, football, martial arts)
• Dislocation or subluxation: the traumatic event causes a bone bruise of the humeral head and/or glenoid
• Occult fractures: trabecular microfractures not visible on X-rays, only detectable on MRI

Overuse causes

• Overhead sports: swimming, volleyball, tennis, baseball, handball — repetitive elevation and rotation movements stress the humeral head
• Subacromial impingement: compression of the greater tuberosity under the acromion during arm elevation creates repeated microtrauma
• Rotator cuff tendinopathy: tendon degeneration is frequently accompanied by greater tuberosity bone marrow edema

Degenerative and metabolic causes

• Glenohumeral osteoarthritis with altered joint surface loading
• Humeral head osteonecrosis (rare; associated with corticosteroids or alcohol misuse)
• Osteoporosis with weakened trabecular structure

Key risk factors

• Over 40 years of age (for degenerative forms)
• Age 15-35 for overhead sport-related forms
• High training volume with rapid increases
• Weak rotator cuff and scapular muscles
• Poor posture (thoracic kyphosis, scapular dyskinesis)

Symptoms and clinical signs

If you have shoulder bone marrow edema, you may notice:

• Deep shoulder pain: felt in the anterolateral region, often difficult to pinpoint exactly
• Pain with overhead movements: worse when raising the arm above 90 degrees or during rotations
• Night pain: particularly when sleeping on the affected side
• Functional limitation: difficulty with daily activities such as brushing hair, dressing, or reaching overhead
• Perceived weakness: a feeling of instability or lack of strength, even without complete tendon tears

During examination, your physiotherapist may find tenderness over the greater tuberosity, positive impingement tests (Neer, Hawkins), restricted painful active range of motion, and pain with resisted rotator cuff testing.

Diagnosis

MRI (essential)

MRI is the only reliable method for diagnosing shoulder bone marrow edema. It shows as high signal on T2-weighted STIR sequences and low signal on T1-weighted sequences, typically located in the greater tuberosity and humeral head. MRI also assesses rotator cuff tendons, the glenoid labrum, and the joint capsule.

X-rays

Standard X-rays appear normal in most cases of isolated bone marrow edema. They help rule out fractures, tendon calcifications, and osteoarthritis signs.

Ultrasound

Ultrasound cannot visualise bone marrow edema because sound waves do not penetrate the bone cortex. It is useful for assessing associated tendon and bursal structures.

Conservative treatment and physiotherapy

Phase 1 — Protection and pain management (weeks 0-4)

• Relative rest: avoid overhead movements and pain-provoking activities
• Ice therapy: 15-20 minutes, 3-4 times daily
• Pain medication: paracetamol, short-term NSAIDs (7-10 days)
• PEMF therapy: 50-75 Hz, 4-6 hours daily for 45-60 days
• Codman pendular exercises: passive arm swings to maintain mobility without loading the joint

Phase 2 — Mobilisation and ROM recovery (weeks 4-10)

• Passive and active-assisted mobilisation using a pulley system
• Posterior capsule stretching (sleeper stretch)
• Active exercises in supported positions: flexion, abduction, rotations with elbow bent
• Isometric rotator cuff strengthening
• Scapular stabilisation exercises (retraction, depression)

Phase 3 — Strengthening and return to activity (weeks 10-20)

• Progressive resistance band exercises: external and internal rotation, abduction, flexion
• Closed kinetic chain exercises: wall push-ups, elevated surface push-ups
• Proprioceptive exercises in open and closed kinetic chain
• Gradual return to sport-specific activities with progressive throwing or athletic gesture programme

Exercises for shoulder bone marrow edema

Phase 1 — Pendular and passive mobility (weeks 0-4)

1. Codman pendular exercises: lean forward, let your arm hang and swing in gentle circles of increasing size. 2 minutes, 3 times daily
2. Table slide: seated, slide your hand across a table into flexion and abduction. 2 sets of 10 repetitions
3. Isometric external rotation: elbow at 90 degrees against a wall, push outward without moving your arm. Hold 5 seconds, 3 sets of 10

Phase 2 — Active mobilisation (weeks 4-10)

1. Overhead pulley: pull the rope with your unaffected arm to lift the affected arm into flexion and abduction. 3 sets of 10 repetitions
2. Sleeper stretch: lying on the affected side, elbow at 90 degrees, use the opposite hand to push the forearm downward into internal rotation. Hold 30 seconds, repeat 3 times
3. Scapular retraction: seated or standing, squeeze your shoulder blades back and down. Hold 5 seconds, 3 sets of 12

Phase 3 — Strengthening (week 10 onwards)

1. Banded external rotation: elbow at your side at 90 degrees, rotate the forearm outward against band resistance. 3 sets of 12, progress band resistance over time
2. Banded abduction to 90 degrees: starting from your side, raise the arm to shoulder height against band resistance. 3 sets of 10
3. Wall push-ups: hands at shoulder height on a wall, bend elbows and push back while controlling scapular movement. 3 sets of 12

When to see a doctor

• Shoulder pain lasting more than 3 weeks despite rest
• Inability to raise your arm above 90 degrees
• Night pain preventing sleep
• Marked weakness when lifting objects or performing rotations
• Recent trauma with severe pain and swelling
• Tingling or numbness in the arm or hand alongside shoulder pain

Prevention

• Rotator cuff maintenance: regular external rotation exercises with a resistance band (3 times weekly)
• Scapular stabilisation: exercises targeting middle and lower trapezius, serratus anterior
• Gradual load progression: increase training volume and intensity by no more than 10% per week
• Proper warm-up: 10 minutes of active shoulder mobilisation before overhead activities
• Posture correction: address thoracic kyphosis and forward shoulder position
• Correct sport technique: work with a qualified coach for swimming, tennis, and volleyball

Differences Between Bone Marrow Edema and Stress Fracture

Bone marrow edema and stress fractures are distinct conditions that often occur together but differ significantly in their pathophysiology. Bone marrow edema represents fluid accumulation within bone tissue due to inflammation or microdamage, while stress fractures involve actual breaks in the bone cortex from repetitive loading. Diagnosis relies on imaging findings, with MRI revealing edema patterns and stress fractures showing characteristic fracture lines. Recovery timelines differ substantially, as edema typically resolves faster with conservative management, whereas stress fractures require extended immobilization and activity modification.

Frequently asked questions

How long does shoulder bone marrow edema take to heal?

Recovery typically takes 2-9 months. Mild post-traumatic cases often resolve within 2-4 months, while those associated with rotator cuff injuries or occult fractures may require 6-9 months of treatment.

Is bone marrow edema in the shoulder serious?

In most cases, shoulder bone marrow edema is a benign, reversible condition. However, it can be an early sign of more serious conditions such as occult fractures, osteonecrosis, or rotator cuff tears, making accurate diagnosis important.

Can physiotherapy help shoulder bone marrow edema?

Yes, physiotherapy is a key component of treatment. Early phases focus on pendular exercises and passive mobilisation to maintain range of motion. Later phases introduce progressive rotator cuff and scapular muscle strengthening.

Can you see bone marrow edema on an X-ray?

No, bone marrow edema is not visible on standard X-rays. MRI is the only imaging modality that can detect it. X-rays remain useful for ruling out fractures, calcifications, and osteoarthritis.

Which sports cause shoulder bone marrow edema?

Sports involving repetitive overhead movements carry the highest risk: swimming, volleyball, tennis, baseball, handball, and CrossFit. Contact sports like rugby and martial arts can cause bone marrow edema through direct trauma.

Does PEMF therapy help shoulder bone marrow edema?

PEMF (pulsed electromagnetic field) therapy can help accelerate bone marrow edema resolution in the shoulder. Typical protocols involve 4-6 hours daily for 45-60 days, with the applicator placed directly over the affected shoulder region.

Sources and scientific references

1. Sein ML, Walton J, Linklater J, et al. “Shoulder pain in elite swimmers: primarily due to swim-volume-induced supraspinatus tendinopathy.” British Journal of Sports Medicine. 2010;44(2):105-113. PubMed
2. Sanders TG, Morrison WB, Miller MD. “Imaging techniques for the evaluation of glenohumeral instability.” American Journal of Sports Medicine. 2000;28(3):414-434. PubMed
3. Cools AM, Dewitte V, Lanszweert F, et al. “Rehabilitation of scapular muscle balance: which exercises to prescribe?” American Journal of Sports Medicine. 2007;35(10):1744-1751. PubMed
4. NICE Guidelines. “Shoulder pain — subacromial disorders.” Clinical Knowledge Summary. National Institute for Health and Care Excellence. 2023. NICE
5. Massari L, Fini M, Cadossi R, Setti S, Traina GC. “Biophysical stimulation with pulsed electromagnetic fields in osteonecrosis of the femoral head.” Journal of Bone and Joint Surgery. 2006;88-A(Suppl 3):56-60. PubMed