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Laser hair removal works by producing hear in the hair follicles which sends a signal to the hair follicle to go into the resting phase called (telogen). The laser is not like what you see on the movie screen as it is just a pulsating light that flashes every couple of seconds.

The hardest part about laser hair removal is targeting the hair shaft without damaging the melanin pigment on the surface of the skin. When the pigment of the skin is affected it can result in temporary pigment changes which will either lighten or darken your skin. Most doctors have several different types of lasers that pulsate a little differently to help accomodate your natural skin color.

Usually a set of 4-6 treatments are given over a period of four to eight week intervals depending on the treatment area. If after the normal 4-6 treatments there is still unwanted hair in the treatment area, consequent treatments are administrated over even longer intervals than the regular four to eight week intervals.

After only one treatment the hair in the treatment area is greatly reduced in the amount of thickness for a very long period of time. It is rare for the first treatment to get rid of all the hair alike. Maintenance treatments are usually always required which are spaced out in long intervals. As with anything else, the frequency of maintenance treatments can vary importantly from person to person.

The reason you need more than just one treatment is because hair grows in cycles. After a laser hair removal treatment, hairs that are cycles to grow will grow because they were not present at the time of treatment. That's why multiple treatments are the most effective because over time all the hair follicles in your skin will cycle, grow, and then get zapped at the time of treatment. By doing multiple treatments you can make sure that all your hair follicles are subjected to the laser treatment and are made dormant.

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Source by Scott Paul