During a skin rejuvenation procedure, the physician uses a laser to send short, concentrated pulsating beams of light to the skin. The light allows for excellent precision, so only the damaged skin receives treatment. The irregular skin is removed, one layer at a time by the laser. While the outer layer of skin, the epidermis, is being removed, the lower lying layers, called the dermis, are being heated. The warmth stimulates the growth of collagen fibers, which are the proteins that give your skin its firmness and elasticity. The new skin that forms will be firmer, smoother and healthier.