Short answer: PEMF has a strong safety record — non-invasive, no ionizing radiation, in orthopedic use since the 1970s, and most people feel nothing during a session. The real safety question isn't side effects (which are mild and uncommon) but contraindications: it's not used over pacemakers or active implants, in pregnancy, or over infection or tumor sites. Proper screening before treatment is what keeps it safe.
Why PEMF is considered safe
Most of PEMF's reassuring profile comes down to what it is and isn't. It's non-invasive — nothing is injected or cut — and it uses a low-frequency electromagnetic field, not ionizing radiation, so it doesn't carry the risks people associate with X-rays. It has been used in orthopedics since the 1970s, originally to help fractures heal, which is a long track record. During a session, most people feel little or nothing at all. Taken together, that's why serious adverse effects are uncommon when it's used appropriately.
The side effects, honestly
They're minor and infrequent. The most that some people notice is:
- Brief lightheadedness or a mild sense of relaxation.
- Mild tingling in the treated area.
- A short-lived increase in symptoms as things settle, which typically passes.
There's no downtime, and nothing to recover from. If you notice anything unusual, we adjust or stop — but for most people a session is uneventful.
Who should not have PEMF — the contraindications
This is the part that actually matters, and where a responsible clinic earns its keep. PEMF is avoided or requires medical clearance in these situations:
- Pacemakers, implanted defibrillators (ICDs), and other active electronic implants — including some neurostimulators and medication pumps. The electromagnetic field can interfere with how these devices work, so PEMF isn't used. This is the most important single contraindication.
- Pregnancy — PEMF is not used, out of caution.
- Active infection in the area to be treated.
- Known or suspected tumor / active cancer — PEMF is avoided over tumor sites, and anyone with a current or recent cancer diagnosis should only consider it with their oncology team's guidance. We go into this specific question in our piece on pain therapy and cancer safety.
- Other situations that warrant caution or a doctor's advice — for example certain bleeding disorders or being unsure about an implanted device. When in doubt, we defer and check.
Why screening is the real safety step
None of this is complicated to manage — it just has to actually be done. Before any PEMF session we ask about implanted devices, pregnancy, infections, cancer history, and other relevant conditions, and we look at the specific area to be treated. If something is a contraindication, we don't treat, and we explain why (and refer if needed). The takeaway for choosing a clinic anywhere: if a place will run a PEMF session without asking these questions, that's a red flag, not convenience. For the flip side — what PEMF can and can't achieve — see does PEMF therapy actually work?
We screen for implants, pregnancy, infection and cancer history before every session, and treat only when it's appropriate — as part of a combined shockwave + PEMF protocol at ₱2,500 per area. If PEMF isn't safe or suitable for you, we'll say so and point you to what is. See the pain service page or the PEMF cost guide.