A specific wavelength of light is used for laser hair removal. The light is beamed upon the skin, where it targets dark color material. It generally damages the melanin in the hair and spares the surrounding tissues.
This complete process is known as selective photo thermolysis. The process targets only the hair and not the skin. Photo means light and thermolysis means destroying with heat.
The right candidate for permanent laser hair removal should have dark hair and light skin. The process will not work on people having red, yellow, or blond hair.
The process of laser hair removal has both pros and cons:
Lot of people have achieved permanent hair removal with laser
Highly useful for areas such as backs or legs
If re-growth occurs, it is generally lighter in color
No accurate data on re-growth rates
Not very successful on unpigmented hair
Improper use can lead to burns or discoloration
There are four types of laser light used for hair removal. Each type has some precise strengths and weaknesses depending on the skin color and hair color.
Alexandrite: Most widely used the laser for hair removal due to its high speed.
Ruby: First laser hair removal method and was extensively used by the dermatologists. Not very popular now.
Diode: Semiconductor diode has some explicit advantages when treating certain hair colors and skin types.
LP ND Yag: Latest amongst all laser types but yet to gain popularity.
Multiple laser treatments are essential for best results. Repeated treatments help in the permanent decline in the amount of visible hair.
A good laser technician can get excellent results with all types of skin and hair. Always consult your local practitioner to find out which kind of laser will work best for you.