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Laser Hair Removal Wavelength and Cooling FAQ

We have organized frequently asked questions about why wavelength and cooling are important in laser hair removal, and what the number of sessions and precautions are.

Laser Hair Removal Wavelength and Cooling FAQ
Table of Contents

First published: 2019-02-07 / Last reviewed: 2026-05-28

This is a guide to GentleMax Pro Plus hair removal, compiled by Dr. Choi Byeong-geun of SHINE U Clinic Konkuk (3 minutes' walk from Konkuk Univ. Station, Exit 1).

As the season for lighter clothing approaches, many people look into hair removal. Although hair removal may seem like a simple procedure, the experience can vary depending on how the wavelength and cooling are managed. We have compiled frequently asked questions.

Why is wavelength important?

Two wavelengths are often mentioned in laser hair removal. This is because the target absorbed differs depending on the wavelength.

  • The 755nm wavelength is applied to thin, light-colored hair and has a high melanin absorption rate.
  • The 1064nm wavelength has good absorption for water and blood vessels, making it useful for various lesion care.

It is known to work by selectively targeting hair follicles while minimizing damage to surrounding normal tissue.

How are concerns about burns addressed?

A common concern in laser hair removal is burns caused by heat. By using a device that cools the skin before, during, and after the procedure, the burden is reduced by maintaining a cool sensation on the surface touched by the handpiece.

Even for the same hair removal, the approach differs depending on the area and hair condition. The key is how to combine wavelength and cooling.

Check if this method is suitable for your skin and hair

How many sessions are needed?

Hair removal is not a one-time procedure. Although it varies depending on the condition, it is generally performed multiple times at intervals of 4 to 6 weeks. A customized plan will be made as the area, hair thickness and density, and growth rate all differ.

ItemConsiderations
AreaDifferences by facial and body areas
Hair conditionThickness and density
Growth cycleGrowth rate by area

What should I prepare before the procedure?

We recommend the following:

  1. Do not pluck hair before the procedure; shave it one or two days prior.
  2. If you have inflammation or a disease, inform your doctor in advance.
  3. You may feel dryness after the procedure, so apply a moisturizing cream thoroughly.

Summary

Laser hair removal is a treatment that combines wavelength and cooling to suit your skin and hair, and is performed multiple times at appropriate intervals. The number of sessions required and the degree of response may vary for each individual, so it is important to first assess your condition and create a customized plan.

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If you are also concerned about blemishes and pigmentation, you can also consider Discovery Ruby.

Leave a hair removal consultation request


Authored by: Dr. Choi Byeong-geun (Chief Director of SHINE U Clinic Konkuk / Member of the Korean Academy of Laser Dermatology and Hair, the Korean Academy of Aesthetic Plastic Surgery and Laser Medicine, the Korean Filler Society, etc.) Last reviewed: 2026-05-28

This article provides general information about procedures and does not replace diagnosis or treatment. The suitability and results of the procedure may vary for each individual.

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