Several Factors will affect laser hair removal result

  • Skin Type
  • Hair Color
  • Hair Cycle
  • External Factors
  • Laser Parameters
  

1.Skin Type

Skin type is the most important factors to affect your laser hair removal results. Different skin tones will have different results.

Light skin : the best candidates for laser hair removal.
There are varying degrees of light skin. However, no matter what type of light skin you have, you are the best candidate for any form of laser hair removal. You will receive the best results almost immediately of any other skin type and will also require fewer treatments. Fewer treatments are necessary.

Medium skin : The color of your hair is the determining factor if you have medium skin.
However, even the best medium skinned candidates will still run a risk of their results being less favorable and needing more treatments than a light skinned candidate.

Dark skin : It is bad results for dark skin perhaps.
Dark skinned will be the most likely have a bad outcome, They must need far more treatments than light skin and medium skin. They also require well-trained and widely experienced practitioners to achieve maximum results.  

2.Hair Type

 Dark hair 
Dark hair, such as black or dark brown is generally the best color of hair to laser hair removal. They contains the most pigmentation which allows the laser light to be absorbed to a greater extent. Also, dark hair is more coarse which will produce a better result.

Medium hair 

It will require more treatment but it is also a very good candidate for laser hair removal treatment.
Medium hair is most often light or medium brown hair. It is more easier to treatment than lighter hair colors, but it may require more procedures than dark brown or black hair. Coarse medium hair will produce better and quicker results than those with fine medium hair.

Light hair 

It is the hardest to work and require more time, money, and procedures.
There are many varying degrees of light hair, light hair contain phemelianin pigment which makes them less able to absorb the laser light. So light hair is the most difficult to treat and will require more time, money, and procedures than other hair color types.

White or Grey hair

It may be almost no effectiveness for laser hair removal.
White or grey hair contains no pigmentation and they can not absorb the laser light enough to heat the hair follicle. So it may be almost impossible to treat those with grey or white hair.



3.Hair Circle


Impacts laser hair removal procedure is hair growth, but it is not all hair are on the same growth cycle even if the hair is in the same area of the body. Therefore you will almost always need more than one procedure to completely treatment one area.









4.External Factors

External factors can also affect the outcome of your laser hair removal procedure.

Tanning or sun exposure
All laser hair removal candidates should be at their lightest skin tone at the time of treatment. Having even the slightest tan can make it harder for the laser light to pass through your skin in order to heat the hair follicle.
Being a light skinned person with a light tan makes the treatment more difficult than being a darker skinned person who has no tan or sun exposure at all. Your practitioner may even give you a topical bleaching cream to apply in the days or weeks before your appointment and regular sunscreen use is recommended.

Herpes
The heat from the laser light can cause a herpes infection to become active if it is in the location of the area to be treated.

History of scarring
A history of abnormal scarring can lead to scarring directly from your procedure.
Scarring is usually not of high concern to those that do not have this kind of history, but if you do then you should discuss it with your practitioner before the procedure begins.

 5.Laser Parameters
Laser parameters will affect hair removal results too.

Wavelength
Alexandrite 755 nm, it is most effective, but only safe on light skin.
Pulsed diode array 810 nm, it is for light to medium type skin.
Nd YAG 1064 nm, it is for darker skin.

Pulsewidth
Longer pulsewidths may be safer for darker skin and shorter wavelengths are more effective in removing hair.

Width of the laser beam
Larger spot sizes help make treatments faster and more effective.

Fluence or energy level
If procedure get high enough settings will cause you permanent damage to the hair follicles.

And the Conclusion
  • Light skin, dark hair, and with no external factors of laser hair removal candidates will benefit the most from this procedure. They need the least amount of treatments and they will also have quicker treatments.
  • They are followed by medium skinned people with dark hair and dark skinned people with dark hair.
  • Light skinned people with light blond or red hair will be difficult to treat and may only achieve a reduction in hair density.
  • The worst candidates for laser hair removal will be darker skinned people with white or grey hair. These individuals may even be impossible to treat.

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