It must be used at this temperature, otherwise it will be ineffective, because only at this temperature will collagen change and regenerate. If it is lower than this temperature, the collagen tissue will not change; If it is higher than this temperature, the skin tissue will be easily damaged. You should know the operation process first. My sister had plastic surgery in Guang Mei, and she said it was not hot there. You can also consult Guang Mei Plastic Surgery Hospital with Baidu. It won't burn your skin. During the operation, the epidermis will be cooled to 65438 0℃ in advance, and most of the electric wave energy will be pushed to the deep layer of the skin to protect the epidermis from being burned. At the same time, the collagen tissue in the deep layer of the skin will be heated to 45-60℃, causing instantaneous contraction and effectively stimulating collagen regeneration, so it has no effect on the skin during the treatment.