XERF, Explained: What It Treats, Who It Suits and What to Expect

XERF is a non-surgical skin tightening treatment that sends radiofrequency energy through the surface of the skin into its shallow, middle and deep layers at the same time. It is used for firmness and laxity of the face, jawline and neck. There are no needles, no numbing and no downtime, a session takes about an hour, and it is £2,600 for the face or £3,000 for the face and neck at our South Kensington clinic. It will not remove loose skin and it is not a facelift.

Radiofrequency is one of the most oversold words in aesthetics, which is a shame, because the physics underneath it is sound and the difference between devices is real. This guide explains what XERF does to skin, what the word multifrequency is actually buying you, how it sits against the other tightening routes at the clinic, and the people we would steer away from it. The treatment detail, the pricing and the suitability list live on the XERF treatment page; this is the reading you might want before you get that far.

What radiofrequency is doing down there

Radiofrequency is not light and it is not sound. It is an electrical current that meets resistance as it passes through tissue, and resistance turns it into heat. Because it is not chasing a target the way a laser chases water or pigment, it is not wavelength dependent, which is why radiofrequency is usually the tool of choice for firmness rather than for tone.

Warming the deeper layers of skin does two things. The collagen already there contracts, which is the immediately tighter feeling people describe when they stand up from the couch. Then the repair response begins, and over the following weeks collagen and elastin thicken, strengthen and shorten. That second part is the one you are actually paying for, and it is the part no device can hurry.

This is also why a tightening treatment is judged at a review rather than in a bathroom mirror the next morning. The day-one effect is real, it is modest, and it fades. The structural change arrives late and lasts.

The bit the name is actually about

Most radiofrequency devices run at a single frequency. A frequency behaves a bit like a setting for depth: it lands its energy where it lands it, and the operator works around that. If the thing bothering you sits deeper or shallower than where the device likes to work, the treatment is a compromise before it starts.

XERF is multifrequency and monopolar, and it is the first skin tightening treatment of its kind. In practice that means one session can address the shallow, middle and deep layers rather than one of them, and the person treating you chooses where to put the energy using three depth settings and ten intensity levels. The system adjusts to the thickness of your skin as it goes.

Two pieces of engineering make that comfortable enough to do without numbing. Wave Fit pulse technology shapes how each pulse is delivered, and Integrated Cryogen Delivery cools the surface while monitoring your skin temperature in real time. The Spider Tip handpiece spreads the energy evenly rather than concentrating it. Taken together, that is why the treatment feels warm rather than sharp, and why you can walk out and go back to work.

XERF against the other tightening routes at the clinic

Nobody should choose a device from a web page, but it helps to arrive at a consultation knowing roughly what the options are for. Everything in this table is available at the South Kensington clinic, which is the point: there is no reason to push one treatment when another suits you better.

Read it as a set of different questions rather than a league table. If your skin has loosened but there is nothing to remove, energy is the right family and the choice within it is a clinical one. If there is genuinely excess skin, every row above the last one is the wrong purchase, and you should expect to be told so.

XERF or RF microneedling

This is the comparison people get wrong most often, because both treatments carry the letters RF and both are offered here.

Radiofrequency microneedling sends energy down through fine needles that pass into the skin. The needling itself contributes, which is why it suits texture and the appearance of scarring as well as firmness, and why it involves some recovery. XERF puts the energy in through the surface. There are no needles, nothing to heal, and the aim is structural tightening rather than resurfacing.

So the question is not which is better. It is whether the thing bothering you is the surface of your skin or the shape it is holding. If the answer is both, that is a plan rather than a single booking, and the order matters.

What a session is actually like

A consultation comes first and is required. Dr Nina or the clinical team assess your skin, your facial anatomy, your medical history and what you want to change, and confirm whether XERF is the right choice or whether something else would be safer or more effective. You are talked through the procedure, the expected outcome and the alternatives, and your plan and price are confirmed in writing. There is no obligation to proceed.

On the day, the settings are matched to your skin, then the handpiece is worked across the treatment areas while the cooling runs. Expect roughly an hour, depending on how much is being treated. You can go back to work straight afterwards.

The aftercare, which is short but not optional

There is no downtime, which is not the same as nothing to do. The clinic gives you this in writing before you leave.

The instruction people find surprising is the one about ice. The temptation after a warming treatment is to cool the skin down, and here that is the wrong move. These instructions come from the XERF clinical guidance and the team will go through them with you.

Who we would talk out of it

Skin tightening sells itself, which is exactly why it is worth being clear about who should keep their money.

If you have significant excess skin or advanced sagging, this is a surgical assessment rather than a device decision. If what has changed in your face is volume rather than firmness, so cheeks that have flattened or a profile that has softened, then tightening the skin over the top will not give you the shape back, and the conversation belongs with sagging skin or jawline definition and jowls so the right route is chosen. If your complaint is pigment or uneven tone with no change in firmness, radiofrequency is the wrong family of treatment altogether, and light-based options suit better.

Pregnancy and breastfeeding, an active infection or a skin condition in the treatment area, and certain implants, devices or medical conditions all change the answer, and they are identified at consultation rather than assumed away. So does expecting a surgical-level lift from a non-invasive treatment, which is a reason to have the conversation before booking rather than afterwards.

What it costs, and how to think about the number

XERF at Facial Sculpting is £2,600 per session for the face and £3,000 per session for the face and neck. How many sessions you need depends on your individual skin and your goals, and it is planned with you at consultation rather than sold as a package in advance. Everything across the clinic is published on the price list.

The useful way to judge that figure is against what the alternative actually is for your face. If a tightening device will genuinely hold what you have for a few years, it is doing a different job from a filler that adds volume, and comparing the two on price alone tells you nothing. If a device will not hold it, the money is better kept.

XERF arrived at the clinic recently enough that the before and after images on the treatment page are the manufacturer's clinical photographs, and they are labelled as such rather than presented as our own work. Our own patients' results will be added as their courses complete, assessed and photographed to the same standard as every other treatment here. Dr Nina Bal was interviewed about the treatment by SheerLuxe for its feature on the K-beauty treatment to know about.

If you want to know whether your skin is a tightening case at all, that is the question a consultation answers in ten minutes and a web page cannot answer at all. Book a consultation at 313 Brompton Road in South Kensington, or message the clinic on WhatsApp. The full treatment detail sits on the XERF page, and the wider picture of which device does what is in our guide to laser and radiofrequency at the clinic.