A laser is aimed through the skin to the hair follicle, thus stopping its growth and if you are a light skinned person with dark hair then it will work the best for you. This is due to the fact that t he colored pigment known as melanin in the hair absorbs light more. There fore the treatment is really effective.
The effect of laser treatment for body hair removal is really good as the hair stops growing for at least six months and a person does not have to worry about hair growth for half of the year.
However this treatment can be expensive and can result in severe inflammation and redness of the skin if you are a sensitive skinned person. Thus after the treatment it is advisable to avoid the sun and use ice packs to cool the skin down. This can avoid you from any redness or swelling.