Can Shockwave Therapy Cause Damage? Who Should Avoid It
Living with chronic pain can be exhausting, and shockwave therapy offers real hope for conditions like tendinopathy and plantar fasciitis. For most people it is a safe, non-invasive treatment with only mild, short-lived side effects such as redness or temporary soreness. But it is not right for everyone, and in the wrong situation it can do more harm than good.
So the useful question is not whether shockwave therapy is dangerous in general, but whether it is safe for you. The guidance below is drawn from the ISMST contraindications and a 2022 best-practice review in PM&R, and a licensed physical therapist in Palm Beach Gardens can confirm where you stand before any treatment.
Quick Takeaways
- For most people shockwave therapy is safe; serious harm comes from treating the wrong person or the wrong area.
- Absolute no-go areas include a pregnant abdomen or pelvis, a tumor in the treatment field, and active infection.
- Use caution with blood thinners or clotting disorders, recent steroid injections, open growth plates, and pacemakers.
- Avoid treating over a fresh fracture, though shockwave is actually used to help certain nonunion fractures heal.
- When in doubt, get assessed first; a qualified provider can match your history to the contraindications.
Who should avoid shockwave therapy? A quick reference
Shockwave therapy should be avoided, or used only with medical clearance, during pregnancy (near the abdomen or pelvis), over tumors, active infections, open growth plates, or fresh fractures, and in people with severe clotting disorders or pacemakers near the site. Most other patients can be treated safely.
| Who should avoid it (or use caution) | Why it is a risk | Typical guidance |
|---|---|---|
| Pregnancy (treatment near the abdomen or pelvis) | A fetus in the treatment field is an absolute contraindication | Avoid; postpone until after pregnancy |
| A tumor in the treatment area | Shockwaves may disrupt or stimulate tumor tissue | Avoid over the tumor; cancer elsewhere is not by itself a barrier |
| Active infection in the area (e.g., cellulitis, osteomyelitis) | Can worsen the infection and delay healing | Treat the infection first |
| Severe clotting disorder or blood thinners | Higher risk of bruising, hematoma, or bleeding | Review with your doctor; may need lower energy or to avoid |
| Recent corticosteroid injection in the area | Steroids can temporarily weaken tendons and ligaments | Commonly wait several weeks before treating |
| Acute or healing fracture in the field | Can disrupt new bone forming at the break | Avoid over a fresh fracture (see note on nonunion below) |
| Open growth plates (typically under 18) | Developing bone may be sensitive to shockwaves | Avoid over growth plates; treat elsewhere if appropriate |
| Pacemaker or other electronic implant near the site | Mechanical energy could theoretically interfere with the device | Discuss with your cardiologist; avoid treating over the device |
Can shockwave therapy cause damage for pregnant patients?
Pregnant patients should not have shockwave therapy near the abdomen or pelvis. A fetus in the treatment field is an absolute contraindication. There are no clinical trials in pregnant women, so the caution comes from animal and lab studies plus professional guidelines that put fetal safety first.
The concern is supported by early-development research. In a study of pregnant rats, fetuses nearest the focal point of the shock waves had a lower mean weight than controls (though no gross tissue damage was seen). A separate study of chicken embryos found a dose-dependent rise in embryo deaths and, in some survivors, serious malformations.
Because human safety data does not exist, both the ISMST and best-practice guidance list pregnancy in the treatment area as a contraindication. The simplest safe path is to wait until after pregnancy.
Can shockwave therapy cause damage with a pacemaker or electrical implant?
If you have a pacemaker or implantable defibrillator, treatment directly over or near the device should be avoided without cardiology clearance. Shockwave delivers mechanical acoustic energy, and the theoretical concern is interference with the device or its leads. Treating an unrelated area, such as a heel or elbow, is usually not an issue.
Best-practice reviews list cardiac pacemakers and implanted devices among the factors a clinician should check before treatment. The risk is highest with energy delivered close to the device, so the practical rule is to keep the treatment field away from it and confirm with your cardiologist first.
Can shockwave therapy cause damage if you have clotting problems or take blood thinners?
Yes, it can raise the risk of bruising and bleeding. Shockwaves can damage small blood vessels in the treated area, which usually causes only minor bruising. In people with clotting disorders such as hemophilia, or on anticoagulants like warfarin, that bruising can be larger or harder to control.
For this reason, severe coagulopathy is treated as a contraindication for high-energy shockwave, and anticoagulant use is something your provider will weigh carefully. Depending on your situation they may lower the energy, choose a different area, or recommend an alternative treatment. Always tell your therapist about every blood thinner you take, including daily aspirin.
Can shockwave therapy cause damage with infection, inflammation, or tumors?
Shockwave should not be applied over an active infection, a region of acute inflammation, or a tumor. Over an infection it can worsen the problem and delay healing; over a tumor it may disrupt or stimulate the tissue. These are standard contraindications in shockwave guidelines.
In an area with a bacterial infection such as cellulitis or osteomyelitis, the mechanical energy can aggravate the site rather than help it, so the infection is treated first. Where there is high acute inflammation, the body is already repairing tissue, and adding mechanical stress can increase swelling and pain.
A malignant tumor in the treatment field is an absolute contraindication, including metastases, multiple myeloma, or lymphoma in that area. Importantly, having cancer elsewhere in the body is not by itself a reason to avoid shockwave for an unrelated problem; the rule is about what sits inside the treatment field.
Can shockwave therapy cause damage after a recent steroid injection?
It can, if the area was recently injected. Corticosteroids reduce pain and inflammation but can temporarily weaken tendons and ligaments, and adding shockwave to freshly injected tissue may strain those structures. Providers commonly wait several weeks after a steroid injection before treating the same area.
Best-practice guidance flags recent corticosteroid injection as a factor to consider before shockwave. The exact wait varies by site and clinician, but the principle is consistent: give the tissue time to recover its strength before introducing mechanical stimulation. Tell your provider about any injection you have had in the area and roughly when.
Can shockwave therapy cause damage if you have a fracture?
Over a fresh or healing fracture, yes, the energy can disrupt new bone forming at the break, so acute fractures in the treatment field are avoided. The nuance: shockwave is actually used as a treatment for certain delayed-healing and nonunion fractures, where it can stimulate bone repair.
The difference is timing and intent. An acute fracture that is still in the early stages of healing should not be treated directly. By contrast, an established nonunion that has failed to heal is one of the recognized uses of high-energy shockwave. This is exactly the kind of distinction a qualified provider makes after imaging, rather than something to judge at home.
Can shockwave therapy cause damage in children or teens?
Shockwave is generally avoided over the open growth plates of children and teenagers under about 18. Growth plates are areas of developing bone near the ends of long bones, and shockwave guidelines treat them as a contraindication when they sit in the treatment field, out of caution for normal bone development.
The epiphyseal (growth) plate in the treatment area is listed as a contraindication for younger patients. That does not necessarily rule out treatment of an area well away from any growth plate, but it does mean a provider should assess a young patient carefully and, where needed, choose a different approach.
What to do if you are not sure
If you are unsure whether shockwave therapy is safe for you, do not guess. Get assessed by a qualified provider who can review your medical history, examine and image the area if needed, and match your situation to the known contraindications before any treatment begins.
- Talk with a qualified provider: share your full history, conditions, and medications with a physical therapist in Palm Beach Gardens experienced in shockwave therapy.
- Get a thorough assessment: a physical exam plus imaging (X-ray or ultrasound) helps rule out fractures, infections, tumors, or implants in the area.
- Check the guidelines: reputable sources like the ISMST publish clear contraindications your provider can match to your case.
Managing chronic pain well comes down to being informed and proactive. With the right assessment and guidance, you can explore shockwave therapy safely, or find a better-suited alternative if it is not right for you.
Frequently asked questions
Is shockwave therapy safe?
For most people, yes. It is a non-invasive treatment and the usual side effects are mild and short-lived, such as redness, tingling, or temporary soreness. The safety issue is about specific contraindications, like pregnancy, tumors, infections, or clotting disorders, rather than the treatment being unsafe in general.
What are the common side effects of shockwave therapy?
The typical side effects are minor and temporary: redness, mild swelling or bruising, tingling, and some soreness for a day or two after a session. More significant problems are uncommon and are usually linked to treating an area or a person that should have been excluded.
How long after a steroid injection can I have shockwave therapy?
Providers commonly wait several weeks after a corticosteroid injection in the same area, because steroids can temporarily weaken tendons and ligaments. The exact timing depends on the site and your clinician’s judgment, so tell your provider about any recent injection and roughly when you had it.
Does shockwave therapy hurt?
It can be uncomfortable during the session, often described as a deep tapping or mild ache over the treated spot, but it is generally well tolerated and brief. A good provider adjusts the energy to a level you can handle while still being effective.
Wondering whether shockwave therapy is safe for you?
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Book an assessment in Palm Beach GardensThis article is general information, not medical advice. Talk to a licensed physical therapist or physician about your specific condition before starting any new treatment.