The action that over time happens is the light stimulates collagen that otherwise would be going dormant. It awakens and reinvigorates the cells that cause your skin to have such luster and elasticity to WAKE UP and be restored. Brown spots from sun damage and redness at this point have dissipated. Your exposure to the environmental elements and how you choose to protect your skin play a key role in how well you respond and sustain the effects that this procedure can have on your cells. Sunscreen and Vitamin C are imperative; you must use daily and possibly reapply two to three times depending on your situation.and your doctors laser hair removal courses