Laser or radiofrequency: which one fixes what you see in the mirror
Laser resurfacing works on the surface of your skin, radiofrequency works on its support. What each one fixes, what it will not, and how to choose.
You asked the same question in two or three places and got two or three different answers. One clinic talks about one session. Another talks about four to eight, spaced one to two weeks apart. Neither is lying. They simply aren't talking about the same device.
The number of sessions comes down to the device's power, not the clinic's generosity.
Here is why the question has two right answers, what changes your own count, and how we decide it for XERF, the radiofrequency we use here.
Two families of radiofrequency, two logics
Most consumer content about facial radiofrequency gives four to eight sessions, one to two weeks apart. That is true for one family of devices: a lower-power radiofrequency, built to be repeated, where each pass heats a little and the effect adds up session after session.
There is another family: monopolar radiofrequency, which heats more deeply in a single pass. The literature on these higher-power devices describes single-session protocols, with follow-up running months after. It isn't the same thing, and it isn't the same heat either.
| Lower power, repeated | Monopolar, at depth | |
|---|---|---|
| Typical sessions | 4 to 8, 1-2 weeks apart | 1 to 2 |
| Logic | Each session heats a little, the effect adds up | One session heats deep enough to kick collagen into gear all at once |
| What limits the energy | A device built to stay cautious on every pass | A device that reads skin resistance and adjusts energy with every pulse |
| Upkeep | Usually yearly, once the protocol is done | One session a year, once the initial sessions are done |
XERF belongs to the second family. According to the manufacturer, Cynosure Lutronic, it combines two frequencies (6.78 MHz and 2 MHz) to heat several layers of the skin at once, down to the supporting tissue.
Why one deep session can replace several gentle ones
It isn't magic, it's thermodynamics applied to skin. A lower-power radiofrequency stays cautious on every pass: it heats a thin layer, and you need to come back several times to build up enough heat in the right spot. A high-power monopolar radiofrequency reaches the target depth in one pass, which triggers right away the same mechanism collagen takes months to finish: existing fibres contract, and the skin makes new ones.
With XERF, the device does part of the work on its own: it reads the skin's electrical resistance with every pulse and adapts the energy delivered, while cooling protects the surface. The rest is chosen in the room, zone by zone: depth and intensity. That's one reason a shorter protocol isn't a shortcut taken on your behalf; it's what the device's power allows.
What changes your own count
Once you know which family of device you're dealing with, there are variables that belong to you:
- How much laxity there is: an oval that's just starting to soften responds faster than laxity that's been settling in for years.
- The areas treated: the face alone doesn't call for the same count as the face and neck together.
- Age and your skin's starting point: the less collagen there is to begin with, the longer rebuilding takes to show.
- What you've already tried: skin that's never been treated and skin already worked by other treatments don't start from the same place.
That's why no article, this one included, can give you a firm number before actually looking at your skin. What we can give you is our own protocol, and why it's what it is.
The schedule here, said up front
For XERF, we count two sessions for an optimal result, about a month apart, then one upkeep session a year, because aging keeps going. A session lasts 90 min, for the full face and neck. There is no downtime: you get on with your day.
That number isn't picked at random: one session already heats at depth, but two sessions give collagen time to finish a first cycle before we start a second one, on the same area. The result reads in two stages: skin feels tighter right after the session, then the real gain builds over three to six months, while collagen rebuilds.
Upkeep, not a lifetime treatment
Two sessions do not mean "it's settled for good." Aging keeps going after the protocol, the same as before it. One upkeep session a year maintains the effect without starting over from scratch each time: it's a yearly number, not a single number that closes the file.
What the assessment decides, either way, is whether XERF is the right answer for you or not. Marked laxity, with excess skin, still belongs to surgery: no radiofrequency, however powerful, repositions tissue that has already dropped. If you're still torn between radiofrequency and another way to work the skin, this article compares the two without selling you either.
The questions we get asked
Can one session be enough?
For very mild laxity, yes, one session of monopolar radiofrequency can start the mechanism. For a result we consider optimal on the oval and neck, we count two sessions here.
How long between two sessions?
About a month. That gives the first collagen cycle time to properly get going before we start the second session on the same area.
How long until I see something?
Skin feels a little tighter right after the session. The real result builds over three to six months, the time it takes for collagen to reform.
Do I need to do this every year?
One upkeep session a year, yes, once the initial protocol is done. It's a reminder, not a full restart.
Why did another clinic offer me eight sessions?
They're probably using a lower-power radiofrequency: the protocol isn't more generous, it makes up with repetition what one deeper session does in one or two passes.
Sources
- MedEsthetics, "Multifrequency RF Technology Transforms Noninvasive Skin Care" (manufacturer figures). Read the article
- “Long-Term Efficacy and Safety of a Novel Monopolar Radiofrequency Device for Skin Tightening: A Prospective Randomized Controlled Study,” Lasers in Surgery and Medicine, 2025 (single session, six-month follow-up). Read the abstract
- “Efficacy and Safety of Monopolar Radiofrequency for Tightening the Skin of Aged Faces,” Cosmetics (MDPI), 2024, vol. 11, no. 3, article 71 (single session). Read the article
- Cleveland Clinic, "Radio Frequency (RF) Skin Tightening." Read the page
- Cynosure Lutronic, XERF product page (manufacturer). Read the page
