Complications and Safety Considerations of Ultrasound and Radiofrequency Energy-Based Devices

Conclusions

• Energy-based skin tightening devices can be effective, but their safety depends heavily on proper training, technique, and patient selection.
• Many reported complications appear to arise from operator error, improper settings, poor coupling, or use of the wrong device depth rather than from the technology alone.
• Earlier radiofrequency protocols using high energy and single passes were associated with fat atrophy, so lower-energy multi-pass approaches are safer while remaining effective.
• Radiofrequency microneedling is generally safe when used correctly, but complications such as burns, pigment change, fat loss, and nerve injury have increased enough to prompt FDA safety concerns.
• Microneedling RF devices should be handled carefully in darker skin types, where superficial energy delivery can increase the risk of post-inflammatory hyperpigmentation.
• Focused ultrasound can achieve tightening without downtime, but deeper treatments and poor technique can cause nerve palsy, burns, bruising, swelling, or tissue loss.
• Uneven coupling, excessive gel, air pockets, and inverted probe positioning are important causes of microfocused ultrasound injuries and can often be prevented.
• Avoiding treatment over major facial nerves is critical to reducing the risk of motor nerve injury with ultrasound-based tightening.
• Newer technologies such as silicone-coated tips and synchronous ultrasound beam systems appear to improve epidermal sparing and overall safety.
• Overall, tissue tightening devices are considered safe and effective when used properly, but clinicians must understand device physics and limitations before treating patients.