There are currently two advanced techniques being used to remove unwanted hair with laser. The first technique utilizes a new generation of Alexandrite, and ruby lasers which have a long pulse duration. These lasers have an affinity for pigment in the hair root and on application the productivity of the hair root is decreased. The hair root is stunned into a prolonged sleeping phase of up to eight months or more. When the hair root wakes up it has been weakened and may not be capable of further growth.
A single treatment with the Alexandrite or Ruby lasers may be enough to eradicate fine, dark hairs. If hairs are light in color, thick or deep they may require multiple sessions or they may not respond at all.
Other photo optic light sources which are similar to lasers are also being used in a similar fashion to remove hair. Although they are not lasers they are often referred to as such.
The second technique utilizes one of four lasers: the Q switched short pulse duration ruby, the Alexandrite, the Nd:Yag or the variable pulse width (VPW) green lasers. These lasers have an affinity for darker pigment. To attract the laser light to the hair follicles a black carbon gel is spread over the skin then wiped off. Some of this gel remains in the pores of the hair follicles. When the laser light is applied it passes harmlessly through the skin and is selectively absorbed by the dark pigment of the carbon gel. The energy emitted by the laser light when it is absorbed causes the carbon molecules to break into minuscule particles. The heat transmitted in this process damages or destroys the adjacent hair follicles. The hair growth in the treated area is significantly reduced or in many cases is completely eradicated. More than one session is usually required to achieve the desired results. The Thermolase hair removal system utilizes this technique and has been approved for this purpose by the Food and Drug Administration in the United States.
Response to either method of laser removal is variable depending on the type of hair, the color of the hair and the depth of the hair root. No assurances can be made as everyone responds differently For this reason a test site is recommended before proceeding with extensive therapy.
Potential complications exist with all forms of hair removal. Failure to respond to the laser light, pigment changes in the skin, or even scar, could occur, although the risk is low Allergic reactions to the get may occur if the second technique is used. One would expect inflammation in the hair follicles for approximately ten days after the procedure.
