This page is provided for educational purposes only to help patients understand shoulder impingement syndrome, its symptoms, and available investigation and treatment options.
If you are experiencing shoulder pain and would like a full clinical shoulder assessment, including diagnostic ultrasound scanning and ultrasound-guided shoulder injections (where clinically appropriate), appointments are booked via the Physio Soton website.
Physio Soton is based in Eastleigh, Hampshire, and online booking is available for comprehensive shoulder assessment, ultrasound scanning, and guided injections.
Shoulder impingement syndrome occurs when the rotator cuff tendons and/or the subacromial bursa become compressed or irritated as they pass through the space at the top of the shoulder (the subacromial space).
This repeated irritation leads to pain, inflammation, weakness, and restricted movement. Shoulder impingement is one of the most common causes of shoulder pain, particularly in people who use their arms frequently for work, sport, or daily activities.
You may also find the following shoulder conditions helpful to read about:
Rotator Cuff Disorders – including tendinopathy and tears causing pain, weakness, and reduced shoulder function
Subacromial Bursitis – inflammation of the bursa often associated with shoulder impingement
Frozen Shoulder (Adhesive Capsulitis) – stiffness and progressive loss of shoulder movement
Calcific Tendinopathy – calcium deposits within the rotator cuff causing acute or chronic pain
Shoulder Tendinopathy – overload-related tendon pain affecting shoulder function
Shoulder impingement usually develops due to a combination of factors rather than a single cause.
Common contributing factors include:
Rotator cuff tendinopathy or partial tears
Subacromial bursitis
Muscle weakness or imbalance
Poor posture or altered shoulder mechanics
Repetitive or overhead activity
Bone spurs or acromial shape
Previous shoulder injury
As inflammation increases, the available space narrows, which can worsen symptoms over time.
People with shoulder impingement often experience pain or difficulty with:
Lifting the arm overhead
Reaching out to the side
Reaching behind the back
Putting on a coat or bra
Sleeping on the affected shoulder
Repetitive lifting or gym exercises
Pain is commonly felt on the outer aspect of the shoulder and may radiate down the upper arm, often worsening at night.
Diagnostic ultrasound provides real-time, detailed assessment of the shoulder structures involved in impingement.
An ultrasound scan can:
Assess rotator cuff tendons
Identify subacromial bursitis or fluid
Detect tendon tears or degeneration
Visualise calcification
Assess tendon movement during shoulder motion
Ultrasound is safe, involves no radiation, and allows immediate clinical decision-making during your appointment.
When pain and inflammation are limiting recovery, ultrasound-guided injections may be recommended as part of your management plan.
Ultrasound guidance ensures medication is delivered:
Precisely to the affected tendon or bursa
With greater accuracy than non-guided injections
While avoiding surrounding nerves and blood vessels
Injections are most effective when combined with physiotherapy, progressive strengthening, and activity modification.
High accuracy and precision
Reduced pain and inflammation
Faster symptom relief
Improved shoulder movement
Better tolerance of rehabilitation
Lower risk of complications
Ultrasound-guided shoulder injections are generally very safe.
Potential risks include:
Temporary increase in pain following injection
Infection (rare)
Skin thinning or colour change
Temporary increase in blood sugar levels
Tendon weakening with repeated steroid injections
Your clinician will discuss whether an injection is appropriate and explain risks and alternatives during your assessment.
Yes. Many cases of shoulder impingement improve with:
Early and accurate diagnosis
Physiotherapy and strengthening
Load and activity modification
Targeted interventions when required
Delaying assessment can prolong symptoms, so early management is recommended.
Recovery time varies depending on severity and underlying cause.
Typical recovery timelines:
Mild cases: 6–12 weeks
Moderate cases: 3–6 months
Long-standing or complex cases: longer with structured care
Ultrasound-guided injections may help reduce pain and accelerate recovery when used appropriately.
Is shoulder impingement the same as a rotator cuff tear?
No. Impingement refers to irritation and compression; rotator cuff tears may coexist but are not always present.
Do I need an MRI scan?
Often not. Ultrasound provides excellent first-line assessment of shoulder soft tissues.
Will an injection cure the problem?
Injections reduce inflammation and pain but work best alongside rehabilitation.
Is the injection painful?
Most patients tolerate injections well. Ultrasound guidance improves comfort and accuracy.
How soon will I feel improvement?
Some patients notice relief within days; others may take 1–2 weeks.
How many injections can I have?
This is assessed individually. Repeated steroid injections are avoided where possible.
Will I need surgery?
Most people do not require surgery and improve with conservative treatment.
Can shoulder impingement return?
Yes, especially if strength and movement patterns are not addressed.
Is ultrasound safe?
Yes. Ultrasound uses sound waves and does not involve radiation.
Should I completely rest my shoulder?
No. Controlled movement and guided exercise are important for recovery.
NHS: Shoulder pain and rotator cuff conditions
British Elbow and Shoulder Society (BESS) – patient information
Versus Arthritis: Shoulder problems
Chartered Society of Physiotherapy – shoulder rehabilitation
NICE guidance on musculoskeletal injections
Marek Czeladzki is a HCPC-registered Physiotherapist and Chartered Society of Physiotherapy (CSP) member, as well as a Musculoskeletal Sonographer and Injecting Therapist. He runs Physio Soton and Southampton Joint Injection Services, specialising in diagnostic ultrasound and ultrasound-guided injections for musculoskeletal conditions.