Online you will find both inflated promises about HIFU and wholly negative accounts of it. This page aims at neither: it separates the method’s real risks and limits, with scientific sources, in a way that helps you decide.
Is HIFU a risky treatment?
Because it is incision-free, HIFU has a generally low complication profile compared with surgery — but no medical procedure is free of risk. Temporary pain and skin sensitivity are relatively common; serious complications are rare. The limitation that deserves the most discussion is that treatment can fall short in a proportion of patients, who may need further treatment over time.
Common, usually temporary effects
Pain during and after the procedure
Heat and pain sensations can occur during treatment, which is why sedation and pain control are used. Lower abdominal pain, pain radiating to the groin or leg, and mild fever may be reported for a few days afterwards; these usually settle on their own or with simple pain relief.
Source: 2022 · International Journal of Hyperthermia2020 · Taiwanese Journal of Obstetrics and Gynecolo
Skin sensitivity and redness
Temporary sensitivity, redness or mild swelling can occur where the ultrasound beam enters the skin.
Source: 2022 · International Journal of Hyperthermia
Less common risks
Skin burns
If energy accumulates in the skin layer, a superficial burn can develop; reports in the literature are mostly mild. Careful patient selection and technique reduce this risk.
Source: 2022 · International Journal of Hyperthermia2020 · Taiwanese Journal of Obstetrics and Gynecolo
Transient nerve irritation
Heat-related nerve irritation — temporary numbness or pain in the leg — has been reported; large series show these effects mostly resolve on their own.
Source: 2020 · Taiwanese Journal of Obstetrics and Gynecolo2021 · Frontiers in Oncology
Rare but important complications
Unintended heat effects on neighbouring tissue
Rarely, heat injury to neighbouring structures such as bowel, bladder or nerve tissue has been reported. Image guidance, safety margins and patient selection minimise this risk — and its rarity does not remove the importance of treatment in experienced hands.
Source: 2020 · Taiwanese Journal of Obstetrics and Gynecolo2022 · International Journal of Hyperthermia
Can the treatment fall short?
The possibility of insufficient ablation
The technical success of HIFU is measured by how much of the fibroid is inactivated (the non-perfused volume ratio, NPV). In some fibroids — especially those that appear bright on MRI — sufficient ablation is hard to achieve, and symptoms may not improve enough.
Source: 2022 · Frontiers in Medical Technology2024 · International Journal of Hyperthermia
The likelihood of retreatment
This is the topic that most deserves an open conversation when considering HIFU.
In comparative meta-analyses, reintervention rates after HIFU/focused ultrasound have been higher than after myomectomy or embolisation.
Source: 2021 · Frontiers in Oncology2022 · International Journal of Hyperthermia
By contrast, in patients who achieve sufficient ablation (NPV above 50%), long-term retreatment rates are much lower: a 2024 meta-analysis reports about 1% at 12 months, 5% at 36 months and 15% at 60 months.
The two findings must be read together: outcomomes track patient selection and ablation quality.
Source: 2024 · International Journal of Hyperthermia2022 · Frontiers in Medical Technology
Pregnancy and fertility: the evidence is not settled
Data here are conflicting: a 2024 meta-analysis found lower pregnancy and live-birth rates after HIFU compared with myomectomy, while a 2023 meta-analysis reported similar live-birth rates across methods.
For patients planning pregnancy, method selection should be individual and this uncertainty discussed openly; a definitive claim that HIFU preserves fertility is not supported by current evidence.
Source: 2025 · Reproductive BioMedicine Online2023 · International Journal of Environmental Resea
Where the evidence is strong — and where it is limited
NICE considers the short-term efficacy evidence adequate and calls for further research on long-term outcomes and effects on pregnancy.
Source: 2011 · NICE (İngiltere Ulusal Sağlık ve Bakım Mükem2024 · International Journal of Hyperthermia
What does this mean for your case?
Averages say only so much about you. Whether HIFU is low- or high-risk in your case cannot be judged without assessing your fibroids.