How to Prepare for Laser Hair Removal (and the Best Time of Year to Start)

Good preparation is the easiest way to get more out of every laser hair removal session. It keeps the laser’s energy where it should be, in the hair root, and away from the surface of your skin. That means better hair reduction and less chance of redness, burns or dark marks. The rules are short. The two that matter most are simple: shave, don’t wax, and keep your skin out of the sun.

This guide gives you a countdown from four weeks out to the day of your appointment. It covers what to expect afterwards and the questions we hear most, from “do I shave before?” to “what if I forgot?” It also explains why fall and winter are the best time to start.

Why preparation matters

Laser hair removal works by sending light into the pigment in the hair. The light turns into heat, which damages the follicle so it grows back slower, finer and sparser. Every prep rule follows from that:

• The root has to be there. The laser targets the pigmented hair inside the follicle. Waxing and plucking pull it out, so there is nothing for the laser to hit.
• The hair above the skin has to be gone. Long hair on the surface soaks up the heat instead and can singe and irritate the skin. Shaving removes it and leaves the root in place.
• Your skin should be at its natural color. A tan, a sunburn or a self-tanner adds pigment to the skin. The laser can then heat the skin as well as the hair, which raises the risk of burns and dark or light patches.

Your laser hair removal prep countdown

When	What to do
4 weeks before	Stop waxing, plucking, threading, epilating and sugaring. Shaving and trimming are fine.
2 weeks before	No sunbathing, tanning beds, spray tans or self-tanner on the area. Wear SPF 30 or higher every day.
A few days before	Pause retinol, retinoids and exfoliating acids on the area, and skip scrubs and peels. Tell us about any medicine you take, especially isotretinoin (Accutane) or antibiotics.
The day before	Shave the area closely with a clean razor.
The day of	Come with clean, dry skin: no lotion, oil, deodorant or makeup on the area. Wear loose, comfortable clothes.

Do you shave before laser hair removal?

Yes. Shave the area the day before your appointment (up to 24 hours ahead). This leaves a short stubble, which is ideal: it shows us where the hair grows, while the root stays in place for the laser to target. Shaving on the morning of your visit is fine too. Some people find it a little more sensitive, and a razor nick or rash can mean we skip that patch.

A few shaving tips:

• Use a clean, sharp razor and shave with the grain to avoid razor burn.
• Do not use hair removal creams in place of shaving; they can irritate the skin before treatment.
• For areas you cannot see or reach easily, such as your back, ask someone to help or tell us when you book.
• Bikini and Brazilian areas need shaving too. The laser is no different there.

Can you wax or pluck before laser hair removal?

Not in the four weeks before your first session, and not between sessions. Waxing, plucking, threading, epilating and sugaring all pull the hair out by the root. The follicle then has no hair in it for the laser to target, so that session does less. Shaving and trimming are the only hair removal you should use during your course of treatment.

If you have been waxing for years, the switch can feel strange at first. But after a few sessions most people find they hardly need to shave at all.

Sun, tanning and self-tanner

The sun is the biggest risk to plan around. Tanned or sunburned skin has more pigment, which competes with the hair for the laser’s energy. That raises the risk of burns, blisters and patches of darker or lighter skin, and it can mean we need to lower the settings or postpone your session.

• Before your session: avoid sunbathing and tanning beds for at least two weeks. Stop spray tans and self-tanners, and let any self-tan fade completely before you come in.
• After your session: keep treated skin out of strong sun and wear a broad-spectrum SPF 30 or higher every day.
• If you are sunburned: call us. We will move your appointment rather than treat burned skin.

In Carlsbad that means daily sunscreen all year round, not just in summer.

Medicines, skincare and health to tell us about

At your consultation we go over your health, skin and hair, and choose the laser settings for your skin tone. Our Fusion Light/Fusion Dark platform is designed to treat all skin tones safely. To get it right, please tell us if you:

• Take isotretinoin (Accutane)Or have taken it in the past six months; it makes skin more fragile.
• Take antibiotics or other light-sensitizing medicinesSome make the skin react more strongly to light.
• Use retinol, retinoids or acidsPause them on the area for a few days before each session.
• Get cold soresLaser on the upper lip or face can set off an outbreak; we may suggest preventive medicine.
• Scar easily or form keloidsWe may test a small area first.
• Are pregnant or breastfeedingWe do not offer laser hair removal until afterwards, because it has not been studied in pregnancy.

Never stop a prescribed medicine without asking the doctor who prescribed it.

The day of your appointment

Arrive with clean, dry skin and no lotion, oil, deodorant or makeup on the area. We cleanse it again before we start. Wear loose clothing that is easy to adjust, and allow a little extra time for your first visit.

You will wear protective eyewear while we glide the handpiece over your skin. Most people feel a quick, warm snap, often compared with a rubber band. Our handpiece has a continuously cooled sapphire tip to keep you comfortable. The whole face takes about 12 to 15 minutes; larger areas such as the legs or back take longer. Please do not apply your own numbing cream at home. If an area is sensitive, tell us and we will plan for it at the studio.

What to expect after laser hair removal

There is no downtime, and you can go straight back to your day. These reactions are normal:

• Redness and small bumps around the follicles, a sign the follicles were heated. They usually settle within a few hours and can last a day or two in sensitive areas. A cool compress or ice pack helps.
• Warmth or tenderness, like a mild sunburn, for a few hours.
• Hair that seems to grow back within one to three weeks. This is the treated hair shedding, not new growth. Let it fall out on its own, or help it along with a gentle washcloth.

For the first 24 to 48 hours, keep things cool and gentle:

Activity	When it is fine
Shower	The same day, in lukewarm water; pat the skin dry
Workout or hot yoga	After 24 to 48 hours, once any redness has gone
Hot tub, sauna or swimming pool	After 48 hours
Deodorant (underarms)	After 24 hours
Makeup (face)	After 24 hours, once redness has settled
Retinol, acids and scrubs	After a few days, once the skin is calm
Shave	After a couple of days, once the skin is calm
Wax or pluck	Not during your course; shave instead

How many sessions you need, and how far apart

Hair grows in cycles, and the laser only works on hairs in their active growth phase. That is why you need a series of sessions, timed to catch each new wave of growth. Most people need six to eight sessions. We space them every 4 to 6 weeks for the face and every 6 to 8 weeks for the body, followed by occasional touch-ups if a few hairs return.

Laser hair removal works best on dark hair. Blonde, red, gray and white hair has little pigment for the laser to target; our guide to laser hair removal for blonde hair explains your options. To learn how your skin tone affects laser treatment, read about Fitzpatrick skin types.

The best time of year to start

Fall and winter are the ideal time to begin. There is less strong sun to avoid, your skin is less likely to be tanned, and a body course started in October or November is often largely done by the following summer. That said, you can start at any time of year in Carlsbad, as long as you keep the area out of the sun and wear sunscreen every day.

What laser hair removal costs at Glow Theory

Prices per session, or for a package of six. Glow Getter VIP members save 20%, from $64 per session. See every area on our laser hair removal in Carlsbad page.

Laser hair removal can also help with razor bumps and ingrown hairs; see can laser hair removal help with acne and ingrown hairs? Ready to start? Book a consultation at our South Carlsbad studio on El Camino Real.