Modern laser and intense pulsed light technology has supplanted electrolysis as state-of-the-art treatment for the effective removal of unwanted hair on the face and body. A laser or light source device directs a bright beam of light to a selected area, causing heat damage to targeted hair shafts and follicles without harming the surrounding tissue. The dark “adult” hair is either permanently removed or replaced with fine, light-colored hair. Determining factors for the level of effectiveness include hair color, hair thickness and skin color. While improvement is noticeable after a single treatment, the best results are accomplished with multiple treatments, usually three to six sessions for a specific area. In most cases, hair re-growth is delayed for up to six months. Permanent reduction in hair growth is achieved in nearly 80% of those treated. Permanent side effects of laser hair removal are rare. Skin darkening is possible, especially if the skin tone is dark to begin with, but in most cases this condition gradually fades. In less than one percent of individuals treated, a skin blemishing or scarring may occur. It is therefore important to follow all pre- and post-treatment instructions carefully.