The main effect of ultrasonic knife is anti-aging, wrinkles are an important manifestation of aging, ultrasonic knife has a better effect in eliminating wrinkles. In addition, ultrasonic knife also has the effect of hydrating the skin, increasing the elasticity of the face, lifting sagging skin tissue and stimulating and producing collagen nutrition. Although ultrasonic knife has a more comprehensive function, but the effect is not immediately visible, about six months after treatment to see the obvious effect, such as wrinkle reduction, facial blowout, hydrated and smooth. Although its postoperative effect is better, but at the same time also accompanied by some risks, as follows: 1, after the completion of ultrasonic knife, the local skin will appear swelling symptoms. This is because receiving the ultrasonic knife is a first damage after repair treatment principle, easy to cause collagen destruction problems, triggering skin swelling symptoms appear, but this symptom can be self-healing; 2, ultrasonic knife is easy to cause the bottom of the dermis damage phenomenon, so that the facial substrate is destroyed, resulting in the loss of facial skin support, collapse, easy to trigger the skin uneven symptoms. The beauty seekers must weigh the pros and cons before undergoing ultrasonic knife beauty, do not only see the good results of ultrasonic knife surgery, but also to understand the side effects of the surgery, there is no need to be overly alarmed when side effects occur, to go to the hospital in a timely manner.