Chronic shoulder pain is one of the most common reasons for an orthopaedic consultation, particularly after the age of 40. When first-line treatments such as physiotherapy, oral anti-inflammatories or rest fail to bring lasting relief, shoulder infiltration is often the next step before considering surgery.
This procedure consists of injecting, directly at the site of the painful structure, a substance with anti-inflammatory, lubricating, or sometimes purely mechanical action. Performed under ultrasound guidance, infiltration provides targeted, faster and more powerful local action than oral treatments, using a much smaller quantity of product than a general administration would require.
Dr Bruno Lévy incorporates shoulder infiltration into a comprehensive, personalised treatment strategy. It is never an automatic or routine gesture: it follows a rigorous diagnostic process, based on imaging and an individual assessment of the patient. The goal remains the same: effective pain relief, preservation of function, and surgery only when truly necessary.
What Is a Shoulder Infiltration?
Intra-articular, Subacromial or Peri-tendinous Infiltration: What’s the Difference?
The shoulder is a complex joint surrounded by several distinct anatomical compartments, and the injection site depends directly on the underlying condition.
Intra-articular glenohumeral infiltrations are performed inside the joint itself. They target capsular or articular conditions, such as frozen shoulder or osteoarthritis.
Subacromial infiltrations are performed in the bursa that separates the rotator cuff from the acromion. They address subacromial impingement and rotator cuff tendinopathies.
Peri-tendinous infiltrations or injections into the long biceps tendon sheath target specific structures such as the long biceps tendon, which is often involved in anterior shoulder pain.
In every case, ultrasound guidance is essential: it allows the needle to be positioned with millimetre precision, confirms that the product is delivered to the right location, and helps avoid any diffusion toward non-targeted structures, particularly the axillary nerve and the circumflex vessels running close to the joint.
When Should an Infiltration Be Considered?
Shoulder infiltration is considered when conservative measures have failed to control pain after several weeks of treatment. It may also be offered upfront in the case of an acute inflammatory flare-up too disabling to wait for standard treatments to take effect, or for diagnostic purposes when the exact source of the pain remains uncertain. Its main benefit is to break the pain-inflammation-stiffness cycle, allow the resumption of active rehabilitation, and in many cases, avoid or delay surgery. It does not necessarily treat the underlying cause on its own: it opens a therapeutic window that the patient should use to engage in appropriate rehabilitation.
Shoulder Conditions Treated With Infiltration
Rotator Cuff Tendinopathies
Rotator cuff tendinopathies, particularly of the supraspinatus tendon, are one of the most common causes of shoulder pain. They present as mechanical pain, worsened by raising the arm and often occurring at night, disturbing sleep on the affected side.
When physiotherapy and oral anti-inflammatories are not enough, a corticosteroid infiltration into the subacromial bursa can reduce local inflammation and support the resumption of active rehabilitation, which is essential to restore balanced shoulder mechanics
Calcific Tendinopathy and Shoulder Calcifications
Calcific tendinopathy corresponds to a deposit of calcium crystals within a rotator cuff tendon, most often the supraspinatus. This common condition may remain silent or trigger acute, sometimes very intense, pain flare-ups during spontaneous resorption of the calcific deposit.
During the acute, highly painful phase, a corticosteroid infiltration can quickly relieve pain while awaiting natural resorption. When the calcification persists beyond several months and continues to cause mechanical impingement against the acromion, an ultrasound-guided needle barbotage (lavage and aspiration), sometimes called trituration, may be proposed: it involves fragmenting and then aspirating the calcific deposit with a needle, followed by a corticosteroid infiltration to limit the post-procedure inflammatory reaction.
Frozen Shoulder (Adhesive Capsulitis)
Frozen shoulder, or adhesive capsulitis, affects the joint capsule itself rather than the tendons or cartilage. It is characterised by progressive stiffening of the shoulder, associated with often intense pain in the initial phase, and classically evolves through several stages over twelve to eighteen months.
During the painful phase, an intra-articular corticosteroid infiltration can significantly reduce pain, particularly at night, and facilitate rehabilitation. When stiffness persists despite this first infiltration, a capsular distension (or hydrodilatation) may be proposed: this involves injecting, under pressure, a volume of saline solution combined with a corticosteroid, to mechanically stretch the contracted capsule and help restore joint range of motion. This procedure is typically followed by immediate mobilisation with a physiotherapist.
Shoulder Osteoarthritis (Glenohumeral Osteoarthritis)
Glenohumeral osteoarthritis corresponds to progressive wear of the cartilage in the shoulder joint. When it triggers an inflammatory flare-up with joint effusion, an intra-articular corticosteroid infiltration can quickly relieve pain. Outside of flare-ups, in moderate osteoarthritis with cartilage still partially preserved, viscosupplementation with hyaluronic acid can be an interesting alternative for patients wishing to delay surgery, particularly shoulder replacement.
Substances Used for Shoulder Infiltrations
Corticosteroids
Corticosteroids are the substances most commonly used for shoulder infiltrations. Powerful anti-inflammatories, they act within a few days and can provide lasting relief for several weeks to several months depending on the condition and the patient’s individual response. In line with HAS (French National Authority for Health) recommendations, they should not exceed three to four injections per year in the same area, in order to limit potential side effects on surrounding tissue, particularly tendon weakening. This limit is strictly followed by Dr Lévy in his practice.
Hyaluronic Acid
Hyaluronic acid is naturally present in synovial fluid, where it acts as a lubricant and shock absorber. In shoulder osteoarthritis, its properties progressively deteriorate. Intra-articular injection, known as viscosupplementation, aims to restore these altered mechanical properties. The effect is more gradual than that of corticosteroids, setting in over one to two weeks, but is generally longer-lasting, sometimes for several months.
Saline Solution (Capsular Distension)
Used in large volumes and under pressure, saline solution has no pharmacological role here, only a mechanical one: it stretches a contracted joint capsule as part of frozen shoulder treatment. It is most often combined with a corticosteroid during the same procedure.
Platelet-Rich Plasma (PRP)
PRP is obtained from the patient’s own blood, centrifuged to concentrate platelets rich in growth factors. Reinjected at the site of a damaged tendon, it stimulates natural tissue-healing mechanisms. Its effectiveness depends on the healing potential of the targeted lesion: it is better suited to recent, non-calcific tendinopathies than to advanced chronic degenerative lesions.
How Does a Shoulder Infiltration Work?
The Preliminary Consultation
No infiltration should be performed without a thorough preliminary consultation. Dr Bruno Lévy carries out a detailed clinical examination, reviews available imaging (X-rays, ultrasound, MRI) and checks for any contraindications. The main contraindications to be aware of are:
- an active local or general infection,
- unsuitable anticoagulant treatment,
- unstable diabetes, as corticosteroids can cause a temporary rise in blood sugar,
- a known allergy to the product being considered.
It is during this consultation that the benefit/risk ratio is assessed for each patient, and the product and injection site are decided.
The Procedure and Sensations
The patient is comfortably positioned, generally seated or lying down, with the shoulder exposed. The area to be treated is carefully disinfected, and the ultrasound probe is positioned to visualise the anatomical structures in real time: rotator cuff tendons, subacromial bursa, capsule, and nearby nerves and vessels. The needle is inserted under visual guidance and the product is slowly injected in precise contact with the target structure. The procedure generally takes fifteen to thirty minutes depending on the technique used, and is well tolerated. A sensation of pressure or tension is normal, particularly during a capsular distension, and fades quickly after the procedure.
Immediate Aftercare
Within forty-eight hours of the infiltration, a slight increase in pain is possible, related to the mechanical reaction to the injection. It is recommended to limit wide-ranging movements and intense efforts of the arm during this period, and to apply cold intermittently to the shoulder. Light daily activities remain possible from the following day. The anti-inflammatory effect of corticosteroids generally appears within two to five days. The infiltration should ideally be followed by resuming or intensifying physiotherapy, to consolidate the results obtained and work on shoulder mobility and stability.
Complications and Moving on to Surgery
Complications from shoulder infiltrations remain rare when the procedure is performed under good technical and aseptic conditions. The most common side effects are mild and temporary: slight local redness, bruising at the injection site, a temporary rise in blood sugar in diabetic patients, or a few days of increased pain. Infection at the site, although rare, is the most feared complication. Should intense redness, warmth or increasing pain occur in the days following the procedure, prompt medical attention is essential.
When infiltrations, properly performed and combined with appropriate rehabilitation, do not bring sufficient improvement, surgery becomes the most suitable solution. Depending on the condition, Dr Lévy may propose arthroscopic rotator cuff repair, shoulder replacement, or surgical management of instability. The decision is always made in consultation with the patient, following a thorough assessment of their situation.
If you are suffering from persistent shoulder pain, don’t let it settle in over time. An accurate diagnosis and a progressive approach to care are the best allies for a full recovery. Dr Bruno Lévy supports you at every stage, from the initial assessment through to your return to full activity.
FAQ on Shoulder Infiltration
Is a shoulder infiltration painful?
No, the procedure is generally well tolerated. A sensation of pressure or tension may be felt during the injection, particularly during a capsular distension, but it fades quickly.
How long does the effect of a shoulder infiltration last?
Corticosteroids act within a few days, with an effect that can last from several weeks to several months depending on the condition. Hyaluronic acid provides a more gradual but often longer-lasting effect.
How many infiltrations can be performed per year?
For corticosteroids, a maximum of three to four injections per year in the same area, in line with HAS recommendations. This number is always adjusted on a case-by-case basis depending on the response to treatment.
Are there contraindications to shoulder infiltration?
Yes: active local or general infection, unsuitable anticoagulant treatment, unstable diabetes, known allergy to the product being considered.
Is shoulder infiltration reimbursed?
Corticosteroid infiltrations are covered by French health insurance for recognised indications. Hyaluronic acid viscosupplementation is covered for certain indications. PRP is not currently reimbursed.
