High-frequency wave penetrates epidermis and take effect on the collagen-rich dermal tissue directly which makes water molecules move violently in the skin. The movement produces controllable heat and results in contraction of collagen and generation of new collagen and dermalremodeling. The heat will accelerate the blood circle, When the temperature of collagen up to 60 degree, the collagen will be shrink instantaneously. meanwhile, it can stimulates the renewal of collagen. It will break the effect of flexibility fiber and collagen fiber, which reduce the flexibility and tensility of skin.  In response, the collagen contracts and remodels over time, providing you with tighter skin, renewed facial contours. Sagging skin, or other visible signs of aging will appear. As a result, the skin looks tighter, wrinkles reduce gradually.