Firstly, the function of laser is realized by heating the target tissue, that is, the so-called photothermal effect. The basic histological change of skin aging is the reduction of dermal collagen fibers, which leads to skin atrophy, manifested as increased wrinkles and skin relaxation.
Secondly, a large number of experiments have proved that the dermal tissue is heated Collagen cells can produce new collagen directly or by activating a series of related cytokines. In this way, we can achieve the purpose of “rejuvenation” as long as we choose to directly heat the dermis without damaging the epidermis. At present, a variety of lasers have been used in the treatment of non-invasive beauty. The purpose is to effectively heat the dermis and stimulate the activation of its collagen cells to produce more collagen fibers, so as to achieve the reorganization of the collagen layer and the rejuvenation of the skin.