This is a sad story, you and I know in our hearts, the years are getting old, the dead are like this, even though a thousand ways, still can not escape the end of failure. Occasionally tired, faced with the mirror of their own, have also examined the meaning of retaining youth, hesitated to give up to resist. The actual fact is that you can find a lot of people who have been in the business for a long time. You and I both know that time can leave the face with sagging skin, wrinkles, enlarged pores, rough texture, dull skin tone, pigmentation, etc. Some can be eliminated with a single method. Some can be eliminated with a single method, some must be integrated to alleviate one or two, this article will explain the way to deal with one by one. Skin sagging Sagging is the most significant manifestation of skin aging, mainly due to elastic fiber degeneration, collagen fiber degeneration, skin thinning, subcutaneous tissue atrophy and bone loss. When dealing with the situation must be integrated with a variety of approaches: hyaluronic acid or fat filling ultrasound knife, radio frequency, fractional laser, long pulse width 1064nm (or 2940nm) laser, aesthetic therapy (micro-needle or hydro-needle), medical skin care, etc. Ultrasonic knife Scientific name: High Intensity Focused Ultrasound (HIFU). Although it was only approved by the FDA in 2009 and approved for facial skin enhancement, it has become one of the most important means to fight against skin laxity due to its exact effect, high safety and long maintenance effect. Ultrasonic knife treatment before and after comparison The treatment principle is to use focused ultrasound technology, using different probes to gather ultrasound energy at 1.5mm, 3mm and 4.5mm under the skin in a way that does not damage the epidermis, generating high temperatures of 65℃-70℃, causing thousands of tiny, independent thermal coagulation nodes to be formed in the tissue at the level of energy, thus initiating the process of collagen fiber renewal at different levels of tissue. The process of collagen fiber regeneration at different levels of the tissue is initiated, resulting in a continuous and effective lifting and tightening of the skin, especially in the contouring of the lower face. Ultrasonic knife has the advantage of being able to reach the SMAS fascia layer, which enables it to reconstruct a strong and powerful skin support network; its precise energy positioning and high temperature can effectively stimulate fiber contraction and collagen production at the treatment level without damaging the epidermal tissue; it can also produce ideal results when applied alone. However, due to the limitations of the probe shape, ultrasonic knife can not treat the peri-ocular and peri-nasal areas, the effect of the forehead treatment is not satisfactory, the comfort of the treatment process is also poor, and because its energy is only concentrated in the subcutaneous 2-3 levels, rather than the whole layer, so the overall improvement of the skin is also limited by the effect. The solution is to combine radiofrequency treatment to effectively compensate for the above deficiencies of the ultrasonic knife. Treatment areas of ultrasonic knife