Yes, focused shockwave therapy has a real downside, and it is not right for every patient. The expected effects are temporary: soreness, mild swelling, and occasional bruising at the treatment site that resolve within days. Genuine contraindications exist, including pregnancy, active malignancy at the site, bleeding disorders, active infection, and open growth plates. The bigger variable is not the device. It is the energy dose and the anatomical targeting, both set by whoever is operating the machine that day.
Most shockwave safety pages read like a package insert: a list of effects with no context for which ones are common, which are rare, and which should change a treatment decision. This page is written by the treating physician’s practice, not a publisher summarizing a database. It states plainly what we actually screen for before a session, the side effects patients genuinely experience, the contraindications that stop treatment, and the one factor that determines safety more than the brand of machine in the room: who is operating it.
None of this is meant to talk anyone out of shockwave therapy. It is meant to describe it accurately, including the parts a sales-oriented clinic would rather skip.
The common, expected, and temporary effects
Focused shockwave predictably produces some discomfort. Soreness at the treatment site, during the session and for one to three days afterward, is common and expected, along with mild swelling, transient skin redness, and occasionally small areas of bruising, more likely at higher energy settings. Some patients notice their baseline pain increase slightly in the first 24 to 72 hours before improvement begins. That is a tissue response, not a sign the treatment failed or caused harm. A 2015 systematic review of extracorporeal shock wave therapy across orthopedic conditions, published in the British Medical Bulletin, describes this side-effect profile as consistent and self-limited, resolving without specific intervention in the large majority of patients. None of these effects require canceling a session, but a clinician should explain them before the first one, so they are not mistaken for a complication later.
The genuine contraindications, screened at every visit
Some patients should not receive focused shockwave, and identifying them is a clinical judgment, not a formality. Established contraindications include pregnancy, active malignancy at or near the treatment site, bleeding disorders or active anticoagulant therapy, active local infection, and open growth plates in a skeletally immature patient. A complete tendon rupture is not treated with shockwave; it needs a surgical evaluation first. Patients with an implanted cardiac device may need treatment adjusted or avoided near the device, depending on the specific equipment and manufacturer guidance. Clinical guidance for musculoskeletal shockwave therapy, published in the journal PM&R in 2022, states plainly that patient selection and clinician training are prerequisites for safe delivery, not optional extras. At Dynamic Athlete, this history is reviewed by Aneesh Garg, DO, CAQ, before a device is ever used, and a patient who meets any of these criteria is declined or redirected to the appropriate workup rather than treated anyway.
The rare complication, stated plainly
A small number of case reports in the literature describe Achilles tendon rupture occurring within roughly two weeks of high-energy focused shockwave treatment, in older patients. This is not a common outcome. It is documented, and it is the specific reason energy dose is set to the individual tissue and patient rather than applied at a fixed maximum setting to save time. It is also why a chronic, previously injured, or already-compromised tendon gets evaluated carefully before treatment, and why a course of properly spaced sessions, not a single maximum-intensity dose, is the standard approach. A safety page that omits the rare but real risks is not being cautious. It is being incomplete, and it is why the next section, who actually sets the dose, matters more than which machine a clinic owns.
The safety variable is the operator, not the device
Two clinics can own the identical focused electromagnetic ESWT unit and deliver meaningfully different risk. The variables are the energy flux density selected for the tissue depth and condition, the accuracy of the focal point, guided by palpation, ultrasound, or imaging rather than a fixed template, and the number and spacing of sessions in a course of care. The American Shockwave Training Institute (ASTI), founded by Dr. Garg, teaches this distinction as a foundation of every course it runs: the machine only executes a setting a trained clinician chooses. An untrained operator using the correct machine is still an untrained operator, and the United States has no licensing requirement specific to shockwave operation, so training is a choice a clinic makes, not a baseline the law enforces.
Who we decline to treat
Some patients are told no at Dynamic Athlete, on purpose. A complete tendon rupture needs a surgical evaluation, not shockwave. An active infection or open wound at the treatment site is addressed first, separately. A diagnosis that has not been confirmed by exam or imaging gets worked up before it gets a device pointed at it. Pregnancy, active malignancy at the site, and uncontrolled bleeding disorders are firm stops, not judgment calls made session to session. Declining a session is not a failure to help. It is the same screening discipline applied consistently, and it is why the questions below are worth asking any clinic before booking, including this one.
Questions worth asking any clinic, printed
Print this list. Ask it on the phone before you book anywhere.
- Who reviews my medical history before the first session, and do they ask specifically about pregnancy, anticoagulants, and active infection?
- Who selects the energy dose for my session, a licensed clinician or a fixed protocol used on every patient?
- Is the focal point set by palpation, ultrasound, or imaging, or is every patient treated the same way regardless of anatomy?
- What would have to be true about my case for you to decline treatment?
Frequently asked questions
Is there a downside to shockwave therapy?
Yes. Focused shockwave therapy is generally well tolerated, but it carries real risk and is not appropriate for every patient. The expected downside is short and temporary: soreness at the treatment site, mild swelling, occasional bruising, and transient redness, usually resolving within a few days. The more important downside is less obvious. Two clinics can own the same machine and deliver very different safety, because the real variable is the energy dose selected and the accuracy of anatomical targeting, both set by whoever is operating the device that day. Genuine contraindications exist, including pregnancy, active malignancy at the treatment site, bleeding disorders or anticoagulant therapy, active infection, and open growth plates in younger patients. A 2015 systematic review of extracorporeal shock wave therapy in the British Medical Bulletin supports this profile as generally safe when patients are properly screened and dosed.
What are the most common side effects of shockwave therapy?
The most common effects are local and temporary: soreness or aching at the treatment site during and for one to three days after a session, mild swelling, transient skin redness, and occasionally small areas of bruising, more likely at higher energy settings. Some patients notice a brief increase in their baseline pain in the first 24 to 72 hours before improvement begins, which is an expected part of the tissue response rather than a sign the treatment failed or caused harm. These effects typically resolve on their own without specific treatment. Numbness or tingling near the treatment area is uncommon and usually resolves quickly; if it persists, it should be reported to the treating clinician. None of these effects require a session to be cancelled, but a clinician should explain them before the first treatment.
Who should not get shockwave therapy?
Established contraindications include pregnancy, active malignancy at or near the treatment site, bleeding disorders or active anticoagulant therapy, active local infection, and open growth plates in a skeletally immature patient. A complete tendon rupture is not treated with shockwave; it needs a surgical evaluation first. Patients with an implanted cardiac device may need treatment adjusted or avoided near the device, depending on the specific equipment, per manufacturer guidance. An unclear or unconfirmed diagnosis is also a reason to pause. At Dynamic Athlete, this history is reviewed by Aneesh Garg, DO, CAQ, before a device is used, and a patient who meets any of these criteria is declined or redirected to the appropriate workup rather than treated anyway.
Does shockwave therapy hurt?
Most patients describe focused shockwave as uncomfortable rather than painful, with the sensation concentrated at the treatment site and at the specific depth being targeted. Discomfort is typically more noticeable at higher energy settings and over more sensitive tissue, such as the plantar fascia or a calcific deposit. The energy level is adjusted during the session based on patient tolerance and clinical goals, and most sessions last only a few minutes per area treated. Soreness commonly continues for a day or two afterward. Radial pressure wave, a different and more superficial technology, tends to produce a milder tapping sensation rather than a deep ache. Neither modality requires sedation or anesthesia, and patients typically drive themselves home and resume normal activity the same day.
Can shockwave therapy cause tendon rupture or serious injury?
Serious injury from focused shockwave therapy is rare, but it has been documented. A small number of case reports describe Achilles tendon rupture occurring within about two weeks of high-energy focused treatment, in older patients. This is the exception, not the expected outcome, and it is specifically why energy dose is set to the individual tissue and patient rather than applied at a fixed maximum setting. It is also why chronic, previously injured, or already-compromised tendons are evaluated carefully before treatment, and why a course of properly spaced sessions, not a single maximum-intensity dose, is the standard approach. Reporting a rare but real risk plainly, rather than omitting it, is part of what an honest safety discussion looks like, and it is why clinician training and dosing discipline matter more than which machine a clinic owns.
How does the person operating the device affect safety?
More than the device itself. Two clinics can own an identical focused electromagnetic ESWT unit and produce meaningfully different risk, because the machine only executes settings a person chooses: the energy flux density for the tissue depth and condition, the accuracy of the focal point, guided by palpation, ultrasound, or imaging rather than a fixed template, and the number and spacing of sessions in a course of care. Published clinical guidance for musculoskeletal shockwave, from a 2022 review in the journal PM&R, states plainly that clinician training and patient selection are prerequisites for safe delivery, not optional extras. The American Shockwave Training Institute, founded by Aneesh Garg, DO, CAQ, teaches this distinction in every course it runs nationally: an untrained operator using the correct machine is still an untrained operator.
What does Dynamic Athlete screen for before recommending shockwave?
Every history is reviewed by Aneesh Garg, DO, CAQ, before a device is used, specifically for pregnancy, active malignancy at the treatment site, bleeding disorders or anticoagulant therapy, active infection, and open growth plates. The diagnosis itself is also confirmed, by exam and, when needed, imaging, rather than assumed from the location of pain alone. A complete tendon rupture is redirected to surgical evaluation rather than treated with shockwave. If a case does not clearly fit an evidence-supported indication, that is discussed openly rather than treated anyway to fill a session. This screening happens at every visit in a course of care, not only the first, per our standing protocol, because medical status, medications, and healing status can change between sessions.
Is radial pressure wave safer than focused shockwave?
Not inherently, and the comparison is somewhat beside the point. Radial pressure wave is lower energy and more superficial, so it carries a milder profile of temporary effects, but it is also not a substitute for focused electromagnetic ESWT for the deep tendinopathy, calcific tendinitis, and bone stress indications where the strongest published evidence lives, a distinction covered in depth on our focused versus radial comparison. Choosing radial to reduce risk, for a condition where the evidence and the physics call for focused treatment, trades a real safety margin for a treatment less likely to work at the target depth. The safer path for a deep indication is properly screened and dosed focused ESWT, not a lower-energy technology used at the wrong target.
Medically reviewed by Aneesh Garg, DO, CAQ, double board-certified in Sports Medicine and Internal Medicine, Founder and Medical Director of the American Shockwave Training Institute. Rated 4.9 out of 5 across 179 Google reviews. This article is educational and does not replace an individualized medical evaluation.
If you want a physician to review your history and tell you honestly whether focused shockwave is appropriate for your case, request a consultation or call (303) 997-1733. Screening comes before scheduling.