If you book GentleMax Pro Plus hair removal in Seoul, you aren't choosing a single laser. You're booking one platform that carries two different lasers, and the question that decides your result is which of them goes on your skin, area by area, and at what energy.

The short answer: your skin tone, any recent tan, and how coarse the hair is will point toward one side, the other, or a mix. One session on a trip is the start of a course, not the whole course.

If you're reading this before a trip, you probably already know the device name and want to know whether it's worth fitting into a week or two in Seoul. The worry underneath is usually simple: a two-laser machine in a foreign clinic, set wrong for your skin, leaving a burn or a dark mark. In this article, we'll cover what the Pro Plus actually is, how the laser gets picked for your skin, what it feels like and what can go wrong, how many sessions to expect, and how to plan it around flights and sun.

What is the GentleMax Pro Plus, and how is it different from the Pro?

It's a laser hair removal platform made by Candela that pairs two lasers in one system, and for the decision you're making, the Pro and the Pro Plus carry the same pair.

A 2025 chart review treated patients on both the GentleMax Pro and the GentleMax Pro Plus and describes them as 755 nm alexandrite/1064 nm Nd:YAG platforms.

In plain terms, that's two kinds of light. The alexandrite laser runs at 755 nm (nanometers, a measure of wavelength). The Nd:YAG laser runs at 1064 nm, a longer wavelength.

The same chart review notes that laser parameters such as fluence, pulse width and spot size were set according to the manufacturer's recommendations, with adjustments by experienced staff.

Fluence is the energy delivered per spot. Pulse width is how long each flash lasts. Those settings, plus which wavelength is used, are what your skin actually meets. So when you compare a "Pro" listing with a "Pro Plus" listing, the model name tells you which two lasers are in the room. It doesn't tell you which one will be used on you, or how it'll be set. That's the part worth asking about.

755 or 1064: which laser will be used on my skin?

It depends mainly on your skin tone and on how deep and coarse the hair is, and on one body the answer can differ from area to area.

Start with what each side is good at. A review of the long-pulse alexandrite laser explains that because of its relatively long 755 nm wavelength, it can reach the melanin-rich hair follicles by penetrating the epidermis.

Melanin is the pigment that makes hair dark, and the laser heats the follicle through it. The catch is that skin carries melanin too, and the darker the skin, the more there is at the surface to compete for that light.

That's where the longer wavelength comes in. A 2026 review of cosmetic treatments for darker skin calls the long-pulsed 1064 nm Nd:YAG laser the gold standard for laser hair removal in Fitzpatrick skin types IV to VI.

The Fitzpatrick scale rates skin by how it reacts to sun, and types IV to VI cover the medium-brown to deeply pigmented end. The longer wavelength is the one chosen there because the pigment at the skin's surface is what needs protecting.

The same review concludes that patients with Fitzpatrick skin types IV to VI are at a higher risk for developing hypo- or hyperpigmentation following these procedures.

Hyperpigmentation means dark marks; hypopigmentation means light ones. That's the risk the wavelength choice is meant to keep low.

Deeper isn't automatically better, though. In a lab study on pig skin, dermis temperatures were higher with the 1064 nm laser than with the 755 nm laser, and under relatively high fluence the 1064 nm laser also came with higher risks of tissue damage.

So depth is something to match to the target, not something to maximize. Here's one place I do lean toward depth: when a man tells me earlier hair removal didn't clear the hair, or the hair is very coarse, I read that as a sign the follicles may sit deeper, and I mix in 1064 nm (more on that in our guide to men's hair removal in Hongdae).

Applied to your situation: If your skin is light, the hair is dark and you haven't been in strong sun lately, the alexandrite side is a reasonable place to start. If your skin sits in the medium-brown to deep range, or you're arriving with a fresh tan, expect it to start from 1064 nm. And if it's coarse hair that has resisted treatment before, expect a mix of the two.

Does GentleMax hurt? Pain, side effects and risks

Yes, you'll likely feel it as a quick sting of heat with each pulse, and the risks are mostly about the skin surface, which is why cooling and sun matter as much as the laser choice.

Pain is a reported effect, not a rare surprise. A Cochrane review of laser and light hair removal trials lists pain, skin redness, swelling, burned hairs and pigmentary changes as infrequently reported adverse effects.

The skin surface is cooled during treatment. That cold is there to protect the surface rather than to numb it, and it can be part of what you feel.

What you do before the appointment counts. Skip waxing and plucking, because they pull out the hair the laser needs to find. Keep strong sun off the area, because a tan adds pigment to the very surface you're trying to protect. Mention both at your consultation, along with any self-tanner.

Afterward, sun protection on the treated area is non-negotiable.

Mild redness and swelling around the follicles afterward can happen. If you see blistering, crusting that spreads, redness that keeps getting worse, or you develop a fever, don't wait it out. Seek medical care right away.

How many GentleMax sessions will I need?

More than one, and the number can't be set before the area is examined, because hair removal works as a reduction over a series of treatments, not a one-visit result.

The Cochrane review found a short-term effect of approximately 50% hair reduction with alexandrite and diode lasers up to six months after treatment.

The same review found little evidence for an effect with the Nd:YAG laser, and long-term hair removal wasn't documented for any treatment.

That review is from 2006 and included eleven randomized trials, none of high quality, so treat it as a rough guide rather than the final word. It's also why 1064 nm is best seen as the gentler route for darker skin, not the stronger one, and why the goal is reduction rather than removal.

What moves the count up or down:

• Hair: coarse, dark hair gives the laser more to work with than fine or light hair.

• Skin tone: darker or tanned skin calls for a more careful setting.

• Area: each area responds on its own timeline, so a plan covers areas separately.

• History: earlier treatments that didn't work are useful information, not a lost cause.

The honest test is regrowth. Compare the area before each session with how it looked at the last one, under the same light, and that tells you whether the current setting is doing its job.

Within your travel schedule: flights, sun and after you fly home

Unless you've had sedation that day, there's no reason to put off the treatment because of your flight home.

Sightseeing and photos are a different question. How the treated skin looks that evening depends on the area and the setting, so ask about your specific area when you book rather than counting on a promise from an article.

The bigger travel variable is the sun. If Seoul is one stop on a longer trip with beach days, mention where those days fall, before and after your appointment. Sun before treatment changes the setting, and sun after it is what aftercare asks you to avoid. Cover the treated area outdoors and use sunscreen.

One visit still counts. Hair removal is a series, so a single trip starts the course rather than finishing it. It makes the most sense if you'll be back in Seoul or plan to continue at home. Either way, ask for a note of which laser was used on each area, so whoever treats you next isn't starting from zero.

After you fly home, if something looks off, you can send photos of the area to our WhatsApp. If it's a clear warning sign such as blistering, spreading redness or fever, see a doctor where you are first.

The Bottom Line: ask which laser, on which area, and why

• The Pro and Pro Plus carry the same two lasers; the choice and the settings are what reach your skin.

• Alexandrite targets follicle pigment well; 1064 nm is the reference choice for darker skin, and deeper isn't automatically better.

• Expect some sting, and redness can happen; recent sun, waxing and plucking change the plan.

• Expect a course of sessions and a reduction, and plan it around your trips.

Like any laser treatment, it comes with trade-offs, and the right setting depends on your skin, your hair and your schedule.

Here's the one thing to take into a consultation anywhere. Ask which wavelength will be used on each area you want treated, and why that one for your skin. A clear answer names your skin tone, any recent sun, and how coarse the hair is. A vague one just names the machine.

If you're planning a trip, you can message Beautystone in Seoul's Hapjeong area on WhatsApp before you book. A first message can be as short as: "I'm in Seoul from (arrival date) to (departure date). I'd like GentleMax hair removal on (area). My skin is (light, medium or deep), I was last in strong sun on (date), and I've had (no or some) hair removal before." Add a photo of the area in daylight.