XERF (Serf) Procedure: Step by Step from Consultation to Going Home

XERF (Serf) follows consultation and skin assessment, cleansing and anaesthesia (numbing cream if needed), the treatment itself (about 30–60 minutes), then calming care and aftercare instructions.
Medically reviewed by Dr. Lee Da-in, Medical Director, Daybeau Clinic Seomyeon · Last reviewed October 2026

Step-by-step

  1. Consultation: Dr. Lee Da-in reviews your concerns (loss of firmness, fine lines), medical history, medications and past treatments.
  2. Treatment plan: areas (full face, eyes, jawline, neck), intensity or dose, and the expected course are explained.
  3. Preparation: cleansing, then anaesthesia — numbing cream if needed.
  4. Treatment: performed with XERF monopolar radiofrequency, taking about 30–60 minutes.
  5. Calming and going home: soothing care if needed and aftercare instructions. Downtime: minimal (temporary redness).

How it works

XERF is a monopolar radiofrequency device that uses different frequencies to deliver heat from shallow to deeper skin layers. It contracts and rebuilds dermal collagen to support firmness and fine lines.

Tell the doctor before treatment

  • Current medications (especially blood thinners or photosensitising drugs)
  • Recent procedures and dates
  • Pregnancy or breastfeeding
  • Pacemakers or other implanted electronic devices

For care after treatment, see XERF (Serf) recovery and aftercare.

Medical notice: every procedure can cause side effects such as swelling, bruising, redness, pain, inflammation or pigmentation, and results and their duration vary between individuals. Suitability and method are decided only after a consultation with the doctor. This page is general information, not a diagnosis. Fees follow the clinic's official non-covered fee schedule.

Frequently Asked Questions

How long does XERF (Serf) take?

The treatment itself takes about 30–60 minutes; consultation and numbing time are added.

Is anaesthesia used for XERF (Serf)?

Numbing cream if needed.

How many sessions are needed?

It can be a single session or repeated at intervals depending on your skin.

Dr. Lee Da-in

Not sure this is the right treatment?

Send Dr. Lee's team a photo and your travel dates. We'll suggest a plan and a consultation time.

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