How Does Laser Hair Removal Work?

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Let’s be honest, while we all want smooth, hair free skin, nobody enjoys spending time waxing, shaving, plucking or bleaching hair. It’s time you could be spending do something more enjoyable.

So what’s the alternative? Laser hair removal – a safe and effective procedure which offers permanent hair removal.

laser-hair-removal

So what is a laser?

Did you know that LASER is an acronym which stands for “Light Amplification by Stimulated Emission of Radiation”?

The definition of a laser is an “electronic device that generates an intense beam of single color light by amplifying photons with more energy through collisions with other photons. Laser beams can travel vast distances without dispersion and can carry enormous amounts of energy.”

Complicated right?

Well, basically a laser is a very strong and very focused beam of light. Lasers are used in a huge range of applications, from industry, to communications, to mapping. Laser hair removal relies on specially designed medical grade lasers that are safe to use on human skin.

The three stages of hair growth

To understand how laser hair removal works you need to understand the different stages of hair growth. Hair has 3 different stages of growth and not all hairs grow at the same time. That’s why you may have found sometimes when you wax about a week later there is hair starting to grow again. Usually these are not the same hairs you waxed a week ago, they would be hairs from another follicle that were at a different stage of growth.

The three different stages of hair growth are:

Anagen – the active growth phase. At this stage, the bottom of the hair follicle (the bulb) is attached to the dermis and its blood supply through the dermal papilla.

Catagen – the transition phase. The hair follicle begins to die and enters the catagen phase

Telogen – the resting phase. In this phase, the remains of the hair bulb are inactive and the attached hair easily falls out.

Anagen_catagen_telogen

How do lasers remove hair?

Laser hair removalhair growth

In order to destroy a hair follicle, the bulb of the hair follicle where the blood supplies the hair with oxygen to grow needs to be destroyed as well as the stem cells which are responsible for hair regeneration. To be able to do this, a temperature of about 70 degrees needs to be reached.

Skin

The darker and the thicker a hair is the more pigment it will hold, and the more light it will absorb. This is why it is important that you don’t wax or pluck your hair before a treatment, because if there is no hair there, there is no way for the laser light to treat that hair follicle.

So to recap, what happens is that the light is emitted, is then absorbed by the pigment in the hair, travels through the hair and is converted to heat and destroys the root. That hair is destroyed and does not grow back! It’s just so simple and effective.

Is laser hair removal permanent?

There are 3 main factors that can affect whether or not we can achieve permanent hair removal.

Only hairs in the growing stage (hairs that are in the anagen phase) can be treated successfully, however not all hairs grow at the same time. For example, at any one given time on our body, only about 20-40% of hair is growing (in anagen phase) the others are either in the transition or resting phase. This is why a course of treatments is required to get the different hairs as they enter the growing stage. Treatments are every 8 weeks for the body and 4 weeks for the face.

Secondly, only hair that has pigment can be treated. If you have white, grey, blond or red hair, it is important that you understand these will not respond, as there is no dark pigment in these hairs to hold that light. Therefore the laser cannot generate enough heat to destroy the hair. Also the finer and lighter the hair, the harder it will be to achieve permanent hair removal as there is less pigment in the hair.

The thicker and darker the hair, the more pigment it contains, which means the light will be absorbed, convert to heat and reach a temperature of about 70 degrees, and therefore destroy the root of the hair. If this temperature isn’t reached, the treatment will only damage the hair which will result in lighter finer hairs growing back. In this case the hair follicle will not be effectively destroyed.

And the third factor is skin colour. The lighter your skin the higher the fluence (intensity) you can be treated with. If your skin is darker, the therapist will need to use a lower the fluence to treat you. This is because laser light does not know the difference between the pigments in your hair or you skin, so if you have a tan you increase the risk of burning your skin. It’s best to keep your skin as light as possible, because you can then be treated on a higher fluence. And that’s why if you have a tan, you need to stay out of the sun, wear sunblock every day and start your treatment when the tan is gone.

A safe and effective treatment

Hopefully this article has answered some of your questions about how laser hair removal works, and who the treatment can be effective for. Laser hair removal is an incredibly effective procedure that can eliminate the need to spend countless hours on shaving, waxing and plucking, and means you’ll never be caught out in an embarrassing situation because you didn’t plan ahead.

If you have any more questions about how the procedure works, our therapists are all highly trained & experienced in the use of medical grade lasers, are all laser safety certified and would be more than happy to answer any questions or concerns that you may have about the treatment. Contact us to learn more about the safest, easiest, most permanent method of hair removal.

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