Laser Hair Removal: What It Is , How It Works & How long does it last

Laser hair removal helps us eradicate the most rebellious hair. Learn how it works and which is the most effective treatment depending on your skin type and hair: Alexandrian laser hair removal, Diode laser hair removal or Neodymium-YAG.

What is laser hair removal and how does it work?

Laser removal hair is a type of depilation or epilation that is used to eradicate hair definitively. This aims to eliminate the hair root, getting it to stop growing in the areas where it is applied.

How does laser hair removal work?

This hair removal system uses a pulsed light with a monochromatic beam. The melanin that our hair possesses causes the laser light to eliminate the hair from the root forever. This light causes the follicle to stop producing hair. However, it takes several sessions for this to work.

We must bear in mind that the treatment requires at least six sessions, depending on the age and the affected area. In the first session, only the hair that is growing will be removed. After four weeks the second session can be done to eliminate a little more and in the rest of the sessions what is left is eliminated. These sessions can last minutes or an hour, depending on the area.

One of the most treated areas is the one  that goes from the navel to the bikini area. This consists of concentrating the light through a source of energy so that it is absorbed by the hair follicle until it disappears. It requires the realization of four to six sessions in intervals of three and six months.

laser hair removal

Which laser hair removal is more effective?

At the moment, four light systems are used in laser depilation. These emit different wavelengths, influencing skin penetration and melanin. Next, we recommend you the most effective lasers that we find in the market.

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  • Depilation with Alexandrite laser. This emits at 755 nm depth, is the most effective because it has more range or depth of penetration into the skin. But it has the drawback that it can not be used on dark or tanned skin, as it captures the melanin present in the skin. Although it has the advantage that it reaches even the finest hairs, as it has a long wavelength.
  • Laser hair removal Diode. This has a range of 800 nm, making it not so selective with melanin. This allows it to be safer for dark or tanned skins. It is more effective in treating fine, light hair than black hair.
  • Neodymium-YAG depilation. Emits at 1064 nm. It is the most penetrating and the least effective for removing hair, as it has less affinity to melanin. This is used to remove varicose veins and is perfect for people with colored skin because being a dark skin is the least harmful. Its use should be controlled, as it can leave scars.
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Which is better :  laser hair removal or photoepilation?

When we talk about photoepilation we mean hair removal that includes laser and pulsed light but we must know that they are not the same. The main difference is found in the light used.

Laser hair removal is much more accurate due to the use of monochromatic light, being easier to absorb by melanin. The light goes in the same direction and wavelength through the hair, removing it from the root.

Photoepilation or pulsed light can be used on all skin types. The light is polychromatic and the light beam has different wavelengths, moving in different directions. The advantage is that it adapts to any type of skin and hair. Although its main drawbacks are that it can produce irritations or burns and its slowness, as it needs more sessions to remove hair.

Learn the 4 types of laser hair removal treatments here.

What to do after the treatment?

Laser hair removal can cause redness or irritation. We can combat this by following these tips.

– Use the cream recommended in the consultation to reduce the sensation of heat and irritations.

– Avoid sunbathing in the treated area during the first week and in the following weeks use sun protection throughout the treatment.

– It is recommended not to rub or exfoliate the skin during the following days and not to use makeup.

– During the treatment you can pull the hair from the root or let it fall out on its own, as it can take between seven and ten days to fall out.

How to cure burns caused by this procedure?

Laser hair removal does not have the same risks when it comes to causing burns, as different light systems are used. If you know which laser has been used for hair removal you can know the scope of the same.

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  • – The Neodymium-Yag laser: it can cause more serious burns and leave scars. The diode laser. It causes burns of varying degrees. These are usually first-degree but there have also been cases with deeper burns.
  • – The Alexandrite laser: this like other lasers can cause burns but superficial and leaves no marks.
  • – Photoepilation or pulsed light. This can produce, like the previous one, superficial burns.


Next, we are going to see how to cure the burns produced by laser depilation. First we must differentiate whether they are superficial or deep burns, as the treatment is different.

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If the burns are superficial, apply cold to the affected area and apply a hydrocortisone ointment twice a day. We can also apply a little Aloe Vera to soothe the irritation. In addition, we will avoid the contact of the too hot water in the zone and the solar radiation.

However, if the burns are deep and blistering, you should go to a hospital and under no circumstances exploit them.

How long does laser hair removal last?

That’s the question many patients ask themselves when they’re new to this technique.

Indeed, many women use traditional hair removal methods (wax, razor, creams, tweezers, among others) because they want to look more feminine, hygienic or for simple comfort. However, this brings other consequences, such as spots on the skin, irritations even burns.

[box type=”info” align=”” class=”” width=””]The approximate time is 10 minutes in small areas, PER SESSION up to 45 minutes hair removal in large areas such as whole legs.

For lack of knowledge have not dared to try the most effective treatment on the market: laser hair removal. In addition to being a definitive system to remove hair, today more than ever that reaches all pockets. And among so many doubts that arise to those who come to laser hair removal for the first time, is the question:

How many epilation sessions does it take?

First of all, we must know that the final removal of hair is not in one day, but requires several sessions that are usually 6 to 8 depending on each person.

Then, the average duration of each session depends on the anatomy of a person, that is to say, it is related to the extension of the zone of the body to treat, being able to take from 10 minutes a small zone like upper lip, up to 45 minutes the depilation of complete legs, for example.

Anyway, the results will be visible in the first session, but permanent or definitive hair removal is long term. In the duration of the treatment will depend on some factors such as:

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  • Skin type.
  • The type of hair.
  • The area to be depilated.


The time interval between each session is 2 to 3 months. And the health professionals in charge of the treatment determine the dates of the sessions, since they must coincide with the next hair growth. Therefore, the duration of a laser depilation, that is, of the entire treatment, is 8 to 12 months.

As for how long the hairless skin lasts after the end of the sessions, in 90% of cases it is permanent. If hair comes back, it will be very fine and light colored, therefore, some areas of the body may need maintenance sessions within a few months.