What to Expect: Laser Hair Removal

The Short Answer

Here is how the whole thing actually goes.

You book a complimentary consultation. You come in, we look at your skin and your hair under good light, we talk through your medications and your history, and we place a small test spot somewhere discreet. If your skin behaves the way we expect over the next few days, you come back and start. A small area — underarms, upper lip, chin — takes roughly three to seven minutes of actual laser time. You leave a little pink. The pink fades the same day. Somewhere between one and three weeks later the treated hairs start working their way out of the skin, which looks exactly like regrowth and is not. Four to six weeks after that, you come back and do it again. Most clients work through six to eight sessions to get the reduction they came in for.

That is the entire arc. No downtime, no bandages, no recovery week. The reason we spell it out this plainly is that almost every surprise in laser hair removal is a scheduling surprise or an expectations surprise, not a medical one. People are not shocked by the sensation. They are shocked that hair shows up two weeks after a session and they think the treatment failed, or they are shocked that it takes most of a year to work through a full series, or they book their first appointment nine days before a vacation and find out that timing does not do them any favors.

Laser Me has been treating St. Louis since 2000. Virginia and Rachel Schulte have built a practice around telling people the truth about what a device can and cannot do, and the Candela GentleMax Pro we use is a serious piece of equipment with real limits. If you want the technical side of the platform — the two wavelengths, the cooling, why it can be set safely across a range of skin tones — that lives on the GentleMax Pro page. This page is about the visit.

How It Works

Six steps from booking to bare.

Step One

The Complimentary Consult

No charge, no obligation, about twenty minutes. We look at the area you want treated, assess your skin tone and your hair, and go through medications and history. You will get a straight answer about whether laser is a reasonable idea for you — including a no, when a no is the honest answer.

Step Two

The Patch Test

A few pulses in a small, hidden spot at the settings we intend to use. Then we wait. Your skin gets a few days to tell us what a paragraph of history cannot: how it actually absorbs the energy. This is the single most protective step in the process.

Step Three

Treatment Day

Shaved area, protective eyewear, a burst of cryogen spray a fraction of a second before each pulse. The sensation is a quick snap, like a rubber band flicked against the skin. A small area is finished in roughly three to seven minutes.

Step Four

The First Few Hours

Redness and small raised bumps around each follicle — perifollicular edema. It is the response we are looking for. It typically settles within a few hours, sometimes by the next morning on coarser areas. Cool compress, loose clothes, done.

Step Five

The Shedding Phase

One to three weeks out, treated hairs push out of the skin and fall away. It looks like stubble. It looks like the laser did nothing. It is the opposite: it is the treated hair leaving. A washcloth or a gentle exfoliation moves it along.

Step Six

Session Two, Four To Six Weeks Later

We wait for the next crop of follicles to re-enter their growth phase, because those are the only ones the laser can reach. Then we repeat. Most clients plan on six to eight sessions, and the area you are treating drives the spacing.

Step One, In Detail

What the consultation is really for.

A laser is a tool that puts energy into pigment. That is the entire mechanism, and every question at the consult follows from it. The energy is drawn to the melanin in the hair shaft, travels down to the follicle, and heats the structures that grow the hair. That works cleanly when the hair is darker than the skin around it. The further those two get from each other, the more room there is to work. The closer they get, the more careful the settings have to be. So we assess four things, and none of them are a formality.

Skin tone. We place you on the Fitzpatrick scale — a six-point classification of how your skin responds to sun, from Type I that burns and never tans through Type VI that rarely burns. It is not about ethnicity or how you look in the mirror in January; it is about how your skin behaves under UV. Your type informs the wavelength and the energy we select. The GentleMax Pro carries two wavelengths precisely so that darker skin can be treated with a setting that passes over surface melanin rather than through it.
Hair color and coarseness. This is the honest limiting factor, and we would rather say it at the consult than take your money and disappoint you at session five. Dark, coarse hair holds the most pigment and responds best. Medium brown responds well. Blonde, red, gray, and true white hair have little or no melanin to absorb the energy, and no laser and no setting changes that. Fine vellus hair on the face is also a poor target. If your hair falls in those categories, we will tell you.
Medications and photosensitivity. A long list of common prescriptions makes skin react to light more strongly than it otherwise would: doxycycline and other tetracyclines, some diuretics, certain antifungals, retinoids, St. John's wort. Isotretinoin has its own timeline and we will discuss it specifically. Bring your list — the actual list, not the one you remember. This is the most frequent reason we adjust settings or push a start date.
Hormonal factors. Hair growth is downstream of hormones, so anything driving your hormones drives your results. Polycystic ovary syndrome, pregnancy, perimenopause, thyroid conditions, and testosterone therapy can all keep stimulating follicles that a laser has already treated. It does not mean laser is off the table. It means the arc looks different and maintenance may be part of the plan, and you deserve to hear that in the first twenty minutes rather than the twelfth month.

If you want to work through that list before you drive out to Mason Lane, the candidacy page walks through the same questions in more depth.

Step Two, In Detail

Why we patch test.

Some practices will treat you the same day you walk in. We do not, and we are comfortable being the slower option. A patch test is a handful of pulses in a small spot — the inside of a thigh, a corner of an underarm, somewhere you are not going to be studying in the mirror. We use the exact settings we intend to use on you. Then everyone waits a few days.

What we are watching for is not whether it hurt. It is what your skin does between hour two and day three. Redness that clears on schedule is a green light. Blistering, prolonged darkening or lightening of the skin, or a reaction well out of proportion to the energy delivered is information we would very much rather have on a spot the size of a nickel than across an entire back. Skin does not always do what its Fitzpatrick type predicts. A recent sunburn, a medication you forgot to mention, a tan you thought had faded — the patch test catches all of it.

It also gives you a preview. You will know precisely what the sensation is, on your own body, before you commit to a series. Nobody has ever regretted spending fifteen extra minutes on that. In the meantime, the preparation guide covers what to do in the days between the test and session one — the short version is shave, stay out of the sun, and skip the wax.

Larger Areas, Longer Sessions

Shave, Do Not Wax

Cooling With Every Pulse

Back To Your Day

Step Three, In Detail

What treatment day feels like.

Shave the area the night before or that morning — close to the skin, all of it. This surprises people who assume they should let it grow the way they would for waxing. The opposite is true. Hair above the surface is hair that absorbs energy at the surface instead of at the follicle, which means less effect where you want it and more heat where you do not. Hair below the surface is the target. Come in smooth.

You will get protective eyewear, which is not optional and which means you will not see anything for the next few minutes. The handpiece rests against your skin. A fraction of a second before each pulse, the GentleMax Pro fires a burst of cryogen — a cold spray that lands on the skin ahead of the light and numbs the surface. You feel that cold first. Then the pulse. The sensation people land on almost universally is a rubber band snapped against the skin: sharp, over instantly, immediately followed by more cold. It is a series of quick snaps rather than one long sensation, and your body adjusts to the rhythm within the first several pulses.

Some spots are more sensitive than others. Bone close to the surface makes it sharper — shins, ankles, the upper lip. Areas with dense coarse hair register more, because more pigment means more energy converting to heat. Underarms and bikini are frank about themselves. Forearms and legs are mild by comparison. If you are treating a small area, the whole thing is three to seven minutes of laser time and you will spend longer parking than being treated. A full back or full legs runs longer, but still finishes inside a lunch hour.

There is no numbing cream required, no sedation, no IV, no recovery room. When it is done, you get dressed and go back to your day.

Steps Four And Five

The hours after, and the shed.

Look at the treated area in the mirror within a few minutes and you will see redness, and small raised bumps ringing each individual follicle. That is perifollicular edema. It has an intimidating name and it is a good sign — it is localized swelling around exactly the structures we were aiming at, which is the visible evidence that the energy reached its target. On fine areas like the upper lip it is subtle. On coarse, dense areas like underarms or a bikini line it can look like a field of goosebumps.

It settles on its own, usually within a few hours, sometimes lingering to the next morning on the densest areas. A cool compress helps. So does not making it worse: no hot shower, no gym, no sauna, no scrubbing, and nothing with fragrance for the rest of the day. Sun is the one that matters most in Missouri, where a July afternoon on a patio will do more damage to your results than anything that happens in our treatment room — freshly treated skin is unusually vulnerable to UV, and a burn on treated skin can push your next session back weeks. Cover it or stay out of it. The full list is on the aftercare page.

Then comes the part that generates more worried phone calls than any other stage: the shed. Somewhere between one and three weeks after your session, hair appears in the treated area. It looks like stubble. It feels like stubble. Every instinct says the laser did not work and you have wasted your money.

It is not regrowth. A treated follicle does not release its hair immediately — the hair sits in place while the skin gradually pushes it out, and what you are seeing is the treated hair on its way out rather than new hair on its way in. It will fall away on its own over the following days, and a washcloth or a gentle exfoliating cloth in the shower speeds it along. Do not pluck it, do not wax it, and do not panic. If you have never been told this in advance — and most first-timers have not — the shed reads as failure. It is the opposite.

The Long View

Why 4-6 weeks, and why 6-8 sessions.

Every follicle on your body runs its own clock, independent of its neighbors. A follicle is either actively growing, transitioning, or resting. Only during the active growth phase is the hair firmly connected to the structures the laser needs to affect — and at any given moment, only a fraction of the follicles in any given area are in that phase. The rest are dormant and effectively invisible to the light.

That single fact explains the entire treatment schedule. One session can only reach the follicles that happened to be active that day. The dormant ones are untouched, and they will wake up on their own timetable. So we wait four to six weeks for the next group to cycle into growth, and treat those. Then the next group. Each session is a pass at a different portion of the same area, which is why the series is spread across most of a year rather than crammed into a month. Coming in more often does not accelerate anything — you would just be firing at follicles that are not there to hit. Coming in far less often does not ruin anything either, but it stretches your calendar.

Across a typical six to eight session series, most clients notice the area getting thinner and slower rather than disappearing all at once. Hair grows back finer. The gaps between shaves stretch. Coverage becomes patchy in a good way. The FDA-cleared language for this is permanent hair reduction, and the word reduction is doing honest work in that phrase — it means a lasting decrease in the number of hairs, not a guarantee that a treated area will be bare forever. Some clients come back for an occasional maintenance session, particularly on hormonally driven areas like the face, chin, and neck.

Results vary. They vary with hair color, with skin tone, with hormones, with the area being treated, and with whether you show up for the sessions you scheduled. A client with dark coarse hair on her underarms and a client with light hair on her face are not going to have the same experience, and we will tell you which one you are before you pay for anything. In St. Louis most people start in the fall or winter, when they are covered up anyway and there is no sun to work around, so that they are further into the series by the time Missouri humidity arrives in June. That is a scheduling preference, not a rule — we treat year-round.

Common Questions

First-timer questions.

Your first visit is a complimentary consultation, not a treatment. It runs about twenty minutes. We assess your skin tone on the Fitzpatrick scale, look at your hair color and coarseness under good light, review your medications and any hormonal factors, and answer your questions. We then place a small patch test at the settings we intend to use and give your skin a few days to respond. If it responds the way we expect, we schedule session one.

Most clients describe a quick snap, like a rubber band flicked against the skin. The GentleMax Pro sprays a burst of cryogen onto the skin a fraction of a second before each pulse, so what you feel is cold, then a snap, then cold again. It is a rhythm of brief sensations rather than one sustained one. Bony areas and dense coarse hair register more than forearms or legs. A small area is finished in roughly three to seven minutes.

It almost certainly is not. One to three weeks after a session, treated hairs work their way out of the skin and fall away — a stage called shedding. It looks and feels exactly like stubble, which is why first-timers assume the treatment failed. It is the treated hair leaving, not new hair arriving. Let it shed on its own or move it along with a washcloth or gentle exfoliation in the shower. Do not pluck or wax it.

Redness, plus small raised bumps around each individual follicle. That is perifollicular edema, and it is the response we want — visible evidence the energy reached the follicle. It typically settles within a few hours, occasionally lingering to the next morning on coarse, dense areas. A cool compress helps. Skip the gym, hot showers, saunas, and sun for the rest of the day.

Laser can only affect follicles that are in their active growth phase, and only a portion of the follicles in any area are in that phase on a given day. The rest are dormant. Waiting four to six weeks lets the next group cycle into growth so we can treat them. Coming in sooner does not speed anything up — there would be nothing new to target. Most clients work through six to eight sessions, so the series spans most of a year.

It depends on contrast. The laser targets pigment in the hair, so dark coarse hair responds best, medium brown responds well, and blonde, red, gray, and white hair have little melanin to absorb the energy. The GentleMax Pro carries two wavelengths so a range of skin tones can be treated with appropriate settings. Hormonal conditions such as PCOS, perimenopause, thyroid disorders, and testosterone therapy can keep stimulating follicles and change the arc. Results vary with all of these, and we will give you a straight answer at your consult.

What ToExpect