Shoulder Impingement Syndrome
Shoulder impingement syndrome describes pain from soft tissue being pinched between the top of the arm bone and the bony arch above it, typically during overhead or out-to-the-side arm movement — distinct from, but sometimes overlapping with, rotator cuff tendinopathy, which is covered on its own page. A medical evaluation confirms the diagnosis and its overlap, if any, with rotator cuff pathology.
Common Symptoms
- Pain with overhead reaching or lifting the arm out to the side, often in a specific painful arc of motion
- Pain that can radiate down the outer upper arm
- Pain reaching behind the back or overhead, such as putting on a jacket
- Weakness or pain-related difficulty with overhead lifting
Why It Happens
Repetitive overhead activity, posture, or shoulder blade mechanics can narrow the space between the arm bone and the bony arch above it, pinching the rotator cuff tendons or the bursa that cushions them during movement.
Why It Can Become Persistent
Because the mechanics that cause the pinching (posture, shoulder blade control, overhead activity) often persist in daily life, ongoing use can keep reproducing the irritation unless those contributing factors are addressed.
Who Commonly Gets It
Shoulder impingement is common in people who do repetitive overhead work or sports (swimming, throwing, overhead lifting) and becomes more common with age as rotator cuff tissue quality changes.
How It Is Usually Diagnosed
Diagnosis is clinical, based on the pattern of pain and specific provocative tests; imaging can help distinguish impingement from a rotator cuff tear or other shoulder pathology when the picture is unclear.
Traditional Treatment Options
- Physical therapy: Addressing shoulder blade mechanics and rotator cuff strength is the well-established first-line treatment.
- Activity modification: Temporarily reducing aggravating overhead activity.
- NSAIDs: Sometimes used for symptom control.
- Corticosteroid injection: Can provide temporary relief for some patients.
- Surgical subacromial decompression: Reserved for cases that don't respond to a reasonable trial of conservative treatment.
Why Someone Might Start Looking for Another Option
When physical therapy alone hasn't fully resolved symptoms, people look for additional non-surgical options, including shockwave therapy.
Where Shockwave Therapy May Fit
A systematic review and meta-analysis of 4 randomized trials found shockwave therapy produced significantly better pain and function scores than comparison treatments at 2 to 3 months — but interestingly, not immediately after treatment, and not at 1-year follow-up. A separate case series without a control group found improvement over 12 weeks regardless of the underlying shoulder-blade (acromion) shape. Taken together, this suggests a real but time-limited effect window rather than a lasting structural change — worth knowing when setting expectations.
How Shockwave Treatment Works for This Area
Acoustic pressure waves are applied to the affected shoulder tissue, generally alongside — not instead of — physical therapy addressing shoulder blade mechanics and rotator cuff strength.
What the Treatment Feels Like
Most patients describe a firm tapping or pressure sensation; your provider will discuss what to expect based on your evaluation.
What Happens During Your First Visit
Your visit begins with a provider evaluation focused on your history and a physical exam relevant to your complaint. If shockwave therapy is determined to be clinically appropriate, your first treatment can typically be provided the same visit. See our What to Expect page for the full walkthrough.
New Patient Offer
New Patient Exam + First Treatment — $99
First treatment provided when clinically appropriate following your examination.
Who May Not Be Appropriate
- Suspected significant rotator cuff tear, which needs its own evaluation
- Anyone who has not yet had a medical evaluation to confirm the diagnosis
- Certain circulatory, neurological, or bleeding-related conditions, per your provider's screening
- Active infection, open wounds, or certain bone conditions at the treatment site
This list is not exhaustive. Your provider will screen for contraindications during your evaluation.
Frequently Asked Questions
Not necessarily — impingement describes pinching of soft tissue during movement, which can occur with or without an actual tear in the rotator cuff tendon. Your evaluation will help distinguish between them.
The best evidence found a real improvement at 2-3 months that wasn't clearly sustained at 1 year — worth discussing with your provider as part of a realistic, longer-term plan that includes physical therapy.
What Research Says
Selected sources relevant to shoulder impingement. See the full Research Center for our complete source registry and methodology.
Bulletin of Faculty of Physical Therapy · 2025 · Aldardour, Al-Qudimat, Etoom, et al.
This meta-analysis pooling 4 randomized trials found shockwave therapy produced statistically significant improvements in pain and shoulder function versus comparator treatments at 2–3 months, though no significant difference was seen immediately after treatment or at 1-year follow-up.
Limitations: Only 4 RCTs were pooled, the benefit appeared to be time-window-dependent (present at 2–3 months, not sustained at 1 year), and comparator interventions varied across the included trials.
Acta Orthopaedica et Traumatologica Turcica · 2018 · Çirci, Çağlar Okur, Aksu, Mumcuoğlu, Tuzuner, Çağlar
This uncontrolled case series of 30 patients receiving weekly shockwave therapy for 3 weeks for subacromial impingement found significant improvement in shoulder pain and function scores at 12 weeks, regardless of the patient's underlying acromion shape.
Limitations: No control or placebo group, no blinding, a short follow-up window, and a small single-center sample.
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First treatment provided when clinically appropriate following your examination.