Shockwave Therapy: What It Is, How It Works, and When It May Help
Shockwave therapy has become an increasingly common treatment for stubborn tendon and musculoskeletal problems. It is used by physical therapists, sports medicine physicians and other healthcare professionals for conditions that sometimes fail to improve with exercise, rest or other conservative treatments alone.
But “shockwave therapy” is also a confusing term.
Radial pressure wave therapy, focused shockwave therapy and extracorporeal shock wave therapy (ESWT) are often discussed as though they are exactly the same thing. They are not. Treatment protocols also vary considerably depending on the device, condition being treated and goals of treatment.
So what exactly is shockwave therapy, what does it do, and when might it make sense?
What Is Shockwave Therapy?
Shockwave therapy is a non-invasive treatment that delivers mechanical energy into tissue from outside the body.
In musculoskeletal rehabilitation, the goal is not simply to “break up scar tissue,” as shockwave is sometimes described online. The interaction between mechanical energy and living tissue is more complicated.
Shockwave and pressure-wave treatments are being studied for their potential effects on pain, local tissue biology and the processes involved in tissue remodeling and recovery.
The treatment is typically performed without an incision or injection and often takes only several minutes.
Radial vs. Focused Shockwave Therapy
One of the most important things to understand is that not every device marketed as “shockwave” produces the same type of energy.
Focused shockwave therapy
Focused extracorporeal shockwave therapy delivers acoustic energy that can be concentrated at a selected depth within the tissue.
Depending on the device, focused shockwaves may be generated using electromagnetic, electrohydraulic or piezoelectric technology.
Radial pressure wave therapy
Radial pressure wave devices generate mechanical pressure waves differently. A projectile is accelerated inside the handpiece and strikes an applicator at the skin, producing energy that spreads outward through the tissue.
Radial pressure waves generally have their greatest energy near the surface and disperse as they travel deeper.
In everyday clinical language, radial pressure wave treatment is frequently called “radial shockwave therapy.” Technically, however, radial pressure waves and focused shockwaves are not identical physical phenomena.
That distinction matters when comparing research or deciding whether one treatment protocol applies to another.
What Conditions Is Shockwave Therapy Used For?
Shockwave therapy is most commonly associated with persistent tendon and tendon-adjacent problems.
Conditions for which shockwave or radial pressure wave treatment may be considered include:
Plantar fasciitis / plantar fasciopathy
Achilles tendinopathy
Patellar tendinopathy
Lateral elbow tendinopathy (“tennis elbow”)
Proximal hamstring tendinopathy
Greater trochanteric pain and some gluteal tendon disorders
Calcific rotator cuff tendinopathy
Selected chronic shoulder tendon problems
The amount and quality of research are not equal for every condition.
Plantar fasciitis is one of the most extensively studied applications. In the United States, specific extracorporeal shockwave devices have received FDA approval for chronic proximal plantar fasciitis that has persisted despite conservative treatment.
Research has also examined shockwave therapy across several other tendinopathies, with results varying according to the condition, device and treatment protocol.
How Does Shockwave Therapy Work?
There probably isn't one single mechanism.
Mechanical energy delivered into tissue can create biological responses at the cellular and tissue level. Proposed effects include changes in pain signaling, circulation, cellular activity and tissue-remodeling processes.
This is an important distinction.
Shockwave therapy should not be thought of simply as a machine physically smashing adhesions or scar tissue apart.
A better way to think about it is as a mechanical stimulus that may influence the biological environment of a stubborn injury.
That is one reason shockwave can be particularly interesting in chronic conditions that seem to have stopped progressing despite otherwise appropriate rehabilitation.
Does Shockwave Therapy Hurt?
It can be uncomfortable.
Patients often describe the sensation as repetitive tapping, pulsing or pressure over a sensitive area. Treatment intensity can usually be adjusted based on the tissue being treated and the person's tolerance.
Interestingly, the most sensitive location during treatment can sometimes help a clinician identify an area that deserves further examination—but pain during treatment should never replace an appropriate clinical assessment.
More intensity is also not automatically better.
Shockwave treatment involves variables such as energy or pressure, number of pulses, frequency, treatment location and number of sessions. Those variables can influence both tolerance and treatment response.
How Many Shockwave Treatments Are Needed?
There is no universal number.
Treatment protocols vary according to the diagnosis, chronicity of the problem, type of shockwave device and individual response.
Many musculoskeletal protocols involve a series of treatments rather than a single session. Improvement may also continue after the treatment series has ended because the goal is often to influence a longer biological and rehabilitation process rather than create an immediate short-term change.
That makes shockwave different from treatments judged solely by whether someone feels dramatically better when they walk out of the clinic.
Is Shockwave Therapy a Replacement for Physical Therapy?
Usually, we don't think it should be.
Shockwave is a tool.
If an Achilles tendon is repeatedly being exposed to more load than it can tolerate, treating the tendon without addressing its capacity probably misses part of the problem.
The same applies to plantar heel pain, shoulder tendinopathy and many other musculoskeletal conditions.
Strength, mobility, activity modification, progressive loading and eventually returning the tissue to the demands of normal life or sport can still matter.
A more useful question is therefore not:
“Does shockwave work instead of exercise?”
It is:
“Could shockwave help change the trajectory of a problem so that an appropriate rehabilitation program can move forward?”
For some patients, that may be where the treatment has its greatest value.
What Does the Research Say About Shockwave Therapy?
The answer depends heavily on the condition being treated.
Recent systematic reviews and meta-analyses have found evidence of benefit for pain in several tendinopathies, including plantar fasciopathy, Achilles tendinopathy and lateral elbow tendinopathy. However, results across studies are heterogeneous, and different devices and protocols make simple comparisons difficult.
For plantar fasciopathy specifically, a 2024 systematic review and meta-analysis found reductions in pain with both focused and radial ESWT protocols, while also finding that treatment parameters appeared to influence outcomes and tolerability.
Another 2024 meta-analysis found a reduction in plantar fascia thickness after ESWT but did not find significantly greater pain improvement than other nonsurgical interventions.
That is a good example of why statements such as “shockwave works” or “shockwave doesn't work” are overly simplistic.
The more useful questions are:
What condition is being treated?
How long has it been present?
What type of shockwave or pressure-wave device is being used?
What treatment parameters are being used?
What rehabilitation accompanies treatment?
And is the person actually an appropriate candidate?
Who Should Not Have Shockwave Therapy?
Shockwave therapy is not appropriate for everyone.
Contraindications and precautions depend partly on the device and treatment location. They can include certain bleeding or coagulation disorders, anticoagulant use, active infection in the treatment area, malignancy near the treatment site, treatment around immature bone growth centers and certain vascular conditions.
Pregnancy, implanted devices, neurological impairment and treatment near sensitive structures may also require additional consideration depending on the location and equipment being used.
A qualified healthcare professional should screen for relevant contraindications before treatment.
Is Shockwave Therapy Worth Trying?
For the right problem, it can be a reasonable treatment to consider—particularly when a tendon or other musculoskeletal condition has become persistent and progress with conventional rehabilitation has stalled.
But shockwave should not be viewed as a magic machine.
The diagnosis still matters. Loading still matters. Strength still matters. The type of device and treatment parameters matter. And the overall rehabilitation plan matters.
Our view is that the most useful role for shockwave therapy is often as one part of a larger strategy designed to get a stubborn problem moving forward again.
That is a much more realistic way to understand the technology—and probably a better way to decide whether it belongs in your treatment plan.
References and further reading
Recent research includes systematic reviews and meta-analyses examining extracorporeal shockwave therapy for plantar fasciopathy, Achilles tendinopathy and other tendinopathies. FDA device records also document approved extracorporeal shockwave systems for chronic proximal plantar fasciitis.
Disclaimer: This article is for educational purposes only and is not medical advice. It is designed to help you better understand shockwave therapy and the research behind it. Every situation is different, so treatment decisions should be based on an individual assessment with an appropriate healthcare professional.
