Regardless of the area, lasers generally works by targeting pigment molecules: they induce energy in them and destroy them as energy is converted to heat. This causes both destruction of the pigment and cell damage which then leads to the cells healing cascade which results in collagen and elastin synthesis necessary for a plumper and healthier skin. Laser is also used in skin resurfacing for face and hand rejuvenation. It scrapes off dead superficial skin cells and tightens pores leaving fresher and smoother skin.