Both laser and intense light are merely an energy source. Given the appropriate wavelengths , the specific pigments in the targeted structures will preferentially be heated up and melt like asphalt under the desert sun. Depending on the treatment area, it usually takes from 15 to 45 minutes for each session. The most likely after-effect you will see is slight redness and at times a small raised bump at the treatment site. The redness will usually disappear in 48 hours.
Most people can return to work within hours after the session.
While the treatment will eliminate hair follicles which are actively growing, it is necessary for you to return several times initially, then once every few months to eliminate future crops of growing hair follicles. Facial hair is particularly difficult to eliminate since the growth rate is very high on this area. For age spots, spider and varicose veins, one treatment is usually what it takes. However, at times a second or even third treatment may be necessary especially if there are more than one deeper vessel filling up the spider veins. It is highly unlikely that your insurer will cover for these services.