XERF

What is XERF?

XERF is a non-invasive skin rejuvenation and tightening treatment utilizing high-frequency (radiofrequency/RF) energy. By concentrating RF energy into the deep dermal layer and subcutaneous tissue, thermal energy is generated in the target area. This thermal stimulation causes existing collagen fibers to contract immediately, while simultaneously activating fibroblasts to promote the production of new collagen and elastin. A key feature is its safe use across all skin phototypes.

Mechanism of action: High-frequency thermal energy and dermal remodeling

RF energy is converted to heat through electrical resistance within skin tissue. When dermal temperature reaches 55–65°C, portions of the collagen triple helix denature and contract, delivering immediate tightening effects. Simultaneously, this "controlled thermal damage" triggers wound-healing mechanisms, prompting fibroblasts to generate Type I and Type III collagen and elastin. A combined-therapy trial of microneedle RF, fractional RF, and multi-source non-invasive tightening published in the Journal of Cosmetic and Laser Therapy (2016) demonstrated that leveraging this mechanism achieves full-face rejuvenation with minimal downtime (doi:10.1080/14764172.2016.1228981).

Expected results

XERF is indicated for the following primary skin concerns:

Improvement of Sagging (skin laxity), nasolabial folds, and marionette lines

Reduction of fine lines and expression lines, and improvement of skin texture

Reduction of enlarged pores and skin dullness

Full-face lift and firming of the face contour

Improvement of acne scars and crater-like depressions (scars)

Treatment flow

After confirming skin condition and goals during consultation, cleansing and make-up removal are performed. A topical anesthetic cream is applied as needed and left for 20–30 minutes. During treatment, a dedicated handpiece is glided or stamped across the entire face. Treatment time varies depending on irradiation mode and area, but typically requires 30–60 minutes for the full face. Post-treatment care focuses on moisturization and sun protection.

Downtime and post-operative course

For several hours to one day immediately following treatment, mild flushing or light redness may occur, but these generally subside by the next day. Makeup can be applied from the next day onward. The risk of swelling and bruising is low, and most patients can resume normal social activities without interruption from the following day. Since collagen regeneration takes approximately 3–6 months, results are gradually noticeable over 1–3 months post-treatment. Duration of effects varies individually based on lifestyle and sun exposure, with a typical range of 6–12 months. Maintenance treatments every 3–6 months may be recommended for optimal sustained results.

Evidence: Acne scar improvement with microneedle RF

A 31-patient study published in the Journal of Cutaneous and Aesthetic Surgery (2014; doi:10.4103/0974-2077.138328) showed that after four sessions of fractional RF treatment at 6-week intervals, 80.64% of patients with Grade 3–4 acne scars achieved improvement of two grades or more. Adverse effects were limited to transient pain, erythema, and edema, demonstrating high safety. The RF energy heating mechanism employed by XERF extends this clinical foundation.