The word LASER is an acronym for Light Amplification by Stimulated Emission of Radiation. It consist of a beam of photons having the same wave length. In laser hair removal treatment, some of these photons are absorbed by the pigments of our hair (melanin) and in the process they are destroyed due to heating. This process is known as selective photothermolysis. This method of hair removal is especially effective on dark hair or those in the initial phases of their growth, as they produce a lot of melanin. In a particular session, around 15 to 20% of body hair is destroyed.
As a single session can not destroy all of our body hair, multiple sessions are required to achieve favorable results (on an average, 4 to 8 session). The number of sessions is also dependent on a variety of other factors. For example, young people may require more sessions as their hair will typically grow at a faster rate. Also, people with hormonal disorders will require higher number of sessions. When you approach a dermatologist for this hair removal treatment, he or she will check your medical history and also consider all the required factors to determine the number of sessions required.
Laser hair removal treatments should be performed with caution on pigmented skin because they contain a lot of melanin. There is a risk that the melanin will be destroyed, resulting in permanent white spot. This is why, the dermatologists will perform a lot of tests before recommending this method of treatment to any individual. In order to achieve effective results, it is advisable that you only opt for the services of a skin and laser clinic which has access to the required equipment for conducting these tests. The dermatologists will also consider other factors such as age, overall health condition, allergies etc.
In many people, it becomes difficult to treat certain areas of the body (forearms, thighs etc.) with the help of this treatment. Even multiple sessions may not offer the desired results. Here, such people may require a lot of sessions, within a period of 3 to 6 months. Also, in some people the hair grows at a very high rate and laser hair removal treatment is not able to offer them with permanent results. They can only enjoy long term results, which may last from 6 to 12 months. Here, they might need to repeat the treatment after long intervals.