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Laser Wavelength Guidelines to Know Before a Hongdae Hair Removal Consultation

Hongdae Dermatology Skin Clinic 弘大美丽石医院 · ✦뷰티스닥터 합정역✦ · July 7, 2026

Hello. I’m Youngjin Wi from Beauty’s Doctor. ​ ​ As summer approaches, people start becoming more conscious of hair on exposed areas such as the underarms, arms, and legs. ​ ​ When...

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This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: Hongdae Dermatology Skin Clinic 弘大美丽石医院

Original post date: July 7, 2026

Translated at: August 17, 2026 at 3:51 PM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

Laser Wavelength Guidelines to Know Before a Hongdae Hair Removal Consultation image 1

Hello.

I’m Youngjin Wi from Beauty’s Doctor.

As summer approaches,

people start becoming more conscious of hair

on exposed areas such as the underarms, arms, and legs.

When you search for Hongdae hair removal,

you often come across wavelength names such as

Alexandrite and Nd:YAG.

The names may seem difficult at first,

but the key points are simpler than you might think.

Laser hair removal does not remove all the hair at once

like an eraser.

Instead, it is performed in stages according to the hair growth cycle.

That is why, before a Hongdae hair removal consultation,

it is better to first check which wavelength suits

your skin and hair condition

rather than focusing on how many sessions it will take.

Even on the same area, the criteria considered during a consultation

may vary depending on hair thickness,

skin tone, and follicle depth.

Why Can’t It Be Finished in One Session?

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Laser hair removal works by having

the melanin pigment around the hair follicle absorb laser energy,

with the resulting heat acting on the follicle.

However, not all hair

is always growing in the same phase.

Hair cycles through the anagen, catagen, and telogen phases,

and the phase that generally responds best to laser treatment

is the anagen phase.

Even if you receive treatment today,

hair that is still dormant

may grow again during the next cycle.

For this reason, it is difficult for all the hair

to respond simultaneously in a single session.

Therefore, when looking into Hongdae hair removal,

it is important to consider the intervals and number of sessions

for each area rather than expecting it to be completed at once.

The number of sessions is often adjusted

based on how the hair grows back

and how it responded previously,

rather than according to a fixed number.

Differences Between Alexandrite and Nd:YAG

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The wavelengths frequently discussed during hair removal consultations

are 755 nm Alexandrite

and 1064 nm Nd:YAG.

Both wavelengths are used for hair removal,

but they differ somewhat in how deeply they penetrate the skin

and how strongly they respond to melanin.

Because 755 nm Alexandrite tends to respond well to melanin,

it is often used for thick, dark hair.

It is frequently considered during consultations

for areas such as the underarms, arms, and legs,

where the hair is relatively dark and thick.

1064 nm Nd:YAG has properties that allow it to penetrate relatively deeply,

so it may be used when the follicles are deep

or when skin tone requires careful consideration.

For areas with deep, thick hair,

such as the beard, sideburns, and bikini line,

these characteristics are considered together.

In other words, what matters in a Hongdae hair removal consultation

is not simply the name of the device,

but the process of determining which wavelength suits your area.

Rather than assuming that one wavelength is always better,

it is more useful to understand that the choice depends

on skin tone and hair condition.

Factors That Vary from Person to Person

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Even when the same device is used,

people can respond differently to laser hair removal.

The thicker and darker the hair,

the more melanin it contains,

so it generally tends to respond relatively well to the laser.

In contrast, fine hair, white hair, and blonde hair

contain less melanin and may respond weakly,

or treatment may be limited for these types of hair.

For areas that are heavily tanned

or have hyperpigmentation,

power settings and wavelength need to be considered more carefully.

Because the skin surface can also receive energy,

the consultation may focus on reducing epidermal irritation

or heat sensation.

Immediately after removing hair with waxing or tweezers,

there may not be enough of the follicle for the laser to target,

so it is better to have a consultation after allowing some time to pass.

Hormonal changes or medications can also

alter the pattern of hair growth,

so it is best to mention them in advance during the consultation.

In particular, if hair has suddenly become more abundant

or has repeatedly become darker only in a specific area,

it is better to assess the condition as a whole

rather than considering only the number of hair removal sessions.

What to Check During Your Consultation

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Before a Hongdae hair removal consultation,

it is helpful to ask which wavelength suits

your skin tone and hair thickness.

It is also useful to check the interval required between sessions for each area

and whether a recent history of waxing or tanning could be an issue.

Before and after treatment,

it is also a good idea to learn in advance about care methods

such as sun protection, moisturizing, and when to shave.

You should also check for each area

whether shaving is necessary the day before treatment

and whether saunas or strenuous exercise should be avoided afterward.

Laser hair removal is not a treatment

that is applied in exactly the same way to every area.

Considering skin tone, hair thickness, follicle depth,

and the hair growth cycle together

can make it easier to create a plan for each area.

If you are preparing for Hongdae hair removal,

it is better to consider the wavelength and your skin condition together

rather than looking only at the price or number of sessions.

Frequently Asked Questions

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Q. Is it possible to receive treatment during my first visit?

A. This may vary from clinic to clinic.

Usually, the process begins by checking the condition of the skin and hair,

after which the area, wavelength, and interval are determined.

If your skin is sensitive

or you have recently tanned or waxed,

the timing of treatment may be adjusted.

Q. Can I receive laser hair removal after waxing?

A. Yes, you can.

However, immediately after waxing, there may not be enough of the follicle,

so the laser response may be weaker.

It is better to wait until the hair has grown back for a certain period

and then have its condition checked during a consultation.

The required period may vary somewhat

depending on the area and the rate of hair growth.

Q. Does the treatment hurt a lot?

A. It varies depending on the area, power setting, hair thickness, and individual sensitivity.

People often describe it as a stinging sensation

or the feeling of being snapped with a rubber band.

Devices that use a cooling system may help reduce epidermal irritation,

but the sensation varies from person to person.

If you are concerned about pain,

it is a good idea to ask in advance during the consultation

about how each area may feel and how to care for it.

Thank you for reading this long post.

This was Youngjin Wi.

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