The answer is simple, you want to damage those skin cells to force your body to begin the process of healing and repair. The human body is remarkable in its ability to correct damage to skin cells and generate new ones to take the place of those too badly damaged to repair. Photo Rejuvenation procedures saturate specific components of your skin with damaging light heat in order to stimulate this natural process of rejuvenation. This light helps to spur on the production of collagen, which will help to fill in lines and wrinkles or shallow scarring, while also reducing redness, discolouration, and spots. The body’s natural processes then remove the injured tissue either by disposing of it through the body’s lymphatic system or forcing the damaged tissue to the surface of the skin where it appears as a micro-crust and will slough away, giving the skin a more even tone and texture, and a more youthful appearance which further improves as new skin is generated.