Skin laxity is a manifestation of skin aging, the reason may be the result of a combination of age, long-term sun exposure, changes in hormone levels in the body, and the gravitational pull of the earth. There are also many treatment methods, the most commonly used are: first, the current photoelectric technology, such as ultrasound radio frequency, ultrasonic knife, Thermage, stimulate the body’s collagen, try to make the skin tighten, have a lifting effect. Second, the surgical approach, to remove the sagging skin, or through the existing technology, the fascia upward lift, to achieve the role of lifting, to improve the sagging. Third, thread sculpture, by burying the thread in the SMAS layer under the skin, to improve the role of laxity. Fourth, can be combined with injectable drugs, such as hyaluronic acid, botulinum toxin, also has a lifting effect, there are also autologous serum and other methods. Many times for skin laxity, several methods may need to be used in combination, such as thread sculpting and hyaluronic acid filling, etc.