Thin skin, extremely dry, poor metabolism. RF promotes collagen regeneration and skin metabolism. There is a thin film on the surface of the skin. After absorbing nutrients, the damaged cells will divide and regenerate, break the membrane and appear slight cracks or rashes. As long as you pay attention to moisturizing and nourishing, the repair will disappear in a few days. If they continue to cooperate, they will achieve ideal curative effect. If they can't bear this reaction, they are advised to choose carefully.