In recent years the development of ultrasound knife beauty is in full swing, ultrasound knife technology set epidermis non-invasive, lifting effect quickly, tightening contour obvious, smoothing and fading wrinkles, stimulation of collagen cells and many other comprehensive advantages in one, so the beauty seekers favored. Many people are ready to take the plunge, but the ultrasonic knife is not suitable for everyone, so choose carefully according to your own situation. What two types of people are not recommended to jump the ultrasonic knife beauty pit? First of all, people who are afraid of pain and cannot use anesthesia are not recommended to choose. Because the depth of action of ultrasonic knife is very deep, has reached the superficial muscle tendon system (SMAS), so there will be strong pain, but can be under the good control of the physician, through oral, application or injection of anesthetic drugs to reduce the intensity of pain. The pain at this point is usually within the tolerable range, so you can rest assured. However, if you are a “sensitive person” who cannot use anesthetic drugs and is super afraid of pain, it is recommended that you do not try it. If you really want to try it, you can consider reducing the density and energy of the ultrasound treatment, but the results are not guaranteed. Secondly, ultrasonic knife is also not recommended for people who have excessive skin laxity. In a clinical study by Ulthera in 2010, it was found that 51/70 patients (73%) had, at 3 months after treatment, significant jaw and face lifting effects, and of these 51 patients, 43 (83%) were considered by third-party evaluators to have significant lifting. Thus, the total effective rate was approximately 61%, while the total patient satisfaction rate was 67%. The patients who were dissatisfied with the treatment results were mainly concentrated in older patients with severe skin sagging, so patients with mild to moderate skin laxity are the ideal candidates for ultrasonic knife treatment, and the results are not at all satisfactory for candidates with already excessively lax skin. The elderly population, in particular, needs more than ultrasonic knife to reshape the skeletal support structure. Finally, pregnant women, people with unhealed surgical wounds, and people with large trauma are also not recommended to do ultrasound knife, because ultrasound knife works on subcutaneous tissues, and such people may cause unnecessary harm to their bodies after doing ultrasound knife. In addition to the above-mentioned people who are not suitable to do it, what else should I pay attention to after ultrasonic knife beauty treatment? Pay attention to the correct choice and accept its non-permanent effect. At present, the ultrasonic knife is managed as a medical device in the United States, but it has not been incorporated into medical devices in China and has not been imported, so most of the ultrasonic knife machines in China are pirated. Even if there is a genuine machine, the price will be very high, so if you have the conditions, you can choose to go abroad for treatment. If once you choose carelessly, not only will it not add beauty, but it will even cause serious harm to your body. It is also important to note that no device or product can achieve a single treatment, the effect is maintained permanently. Although the lifting effect of ultrasonic knife can be immediate, and continued new life, long-term maintenance, the average maintenance of up to a year. However, the process of human aging is irreversible, and with ageing and the daily maintenance of individuals, it will have an impact on the duration and effect of the later maintenance. References [1] Liu Zhonglin. The application experience of ultrasonic knife in lower middle face aesthetic surgery [J]. China Medical Aesthetics,2016,6(07):2-4.