The sagging skin is mainly due to the patient’s ageing, skin dehydration, collagen loss and formation, so if you want skin tightening, the first thing you need to do is to replenish water and collagen in time, usually it is recommended to use some brand of skin care products to replenish water for the skin in time, you can go to professional institutions for massage to promote the absorption of water, you can also inject some hyaluronic acid to slow down the aging of the skin. The main diet can eat some high protein, high vitamin food, such as oranges, lemons, eggs, etc., to help increase the body’s energy, so as to replenish the face of the protein, and promote skin tightening. If the above methods do not work, it is recommended that patients can promptly visit a cosmetic hospital and opt for surgical treatment.