First, let’s understand the principle of ultrasonic knife anti-aging. What is ultrasonic knife? The approximate principle is: through ultrasound at a certain depth multi-point aggregation, so that the temperature of the point up to 60 ℃ or 65 ℃. In the different depths of the multi-point linear agglutination, high-temperature condensation points make collagen painful tightening and thus stretching wrinkle removal. Let’s say it is applied to the face. It can cause multi-point agglutination in the SMAS layer of the face. After repeated ultrasonic knife treatment, the entire SMAS layer of subcutaneous tissue is tightened and the fascial layer of subcutaneous tissue is tightened to enhance the skin. Second, the ultrasonic knife this instrument is reliable? 1, whether the instrument is legal Ultrasonic knife is widely used in other medical fields, but in the field of beauty is subject to strict restrictions (the United States has so far approved only one, in China the State Food and Drug Administration has never been approved). 2, ultrasonic knife operation risk Ultrasonic knife used for facial beauty, the focus depth is much shallower, usually 3.0-4.5 mm under the skin, but the human skin thickness is different, around the eyelids are generally thin, forehead, eye corners and other facial nerve dense, so there are great hidden dangers and risks, such as: damage to the facial nerve, local bleeding or even scarring, etc.. Finally, does ultrasonic knife have any harm to the skin? 1, the skin surface As ultrasound in contact with the skin parts without aggregation, only to a certain depth subcutaneous or fascial layer to have multi-point aggregation, the surface does not hurt the skin. During the procedure, the 75 degree high temperature will first destroy the skin surface moisture layer (hyaluronic acid), and at the same time, the high temperature focusing electric shock process during the procedure will evaporate a large amount of moisture under the skin, resulting in abnormal dry skin. 2, dermis Ultrasonic knife is easy to damage to the deep nerve and vascular tissue, causing temporary local numbness, there is also a very small possibility of nerve damage (but the vast majority of them can be recovered). 3, the fascial layer facial ultrasound knife action level in the fascial layer, through the heat transfer to stimulate the subcutaneous, resulting in subcutaneous thermal injury, tissue heat injury after the skin naturally become delicate and firm, said “ultrasound knife” like baked meat damage to the skin is not too much. This is the principle of ultrasonic knife – “healing response”, just as your finger bleeding from a knife cut will heal itself. What if you over-treat? Once the ultrasonic knife treatment is overdone, there will be a large loss of subcutaneous fat, and the face will lose its support, resulting in symptoms such as sunken temples and apple muscles. The reason for this is that since the ultrasonic knife can reach the SMAS layer, it must also penetrate through the fat layer and consume fat. If your face is already thin, and then consumed by ultrasound, it will be sunken.