The downward corner of the mouth can be improved by injecting hyaluronic acid, injecting autologous fat and facelift surgery. 1. Hyaluronic acid injection: injecting hyaluronic acid material into the sagging area can improve skin laxity and make the skin become full, thus improving the phenomenon of downward corner of the mouth. Hyaluronic acid injection is quick and natural. 2. Autologous fat injection: Autologous fat injection is to extract fat from the area with more fat accumulation, and inject it into the sagging corner of the mouth after centrifugal purification to fill in the corner of the mouth, which can effectively improve the situation of the corner of the mouth downward. 3. Facelift surgery: Facelift surgery is to tighten the facial skin upward and backward, and then excise the excess skin, and at the same time tighten the deep fascial layer, which can effectively tighten the facial skin, reduce wrinkles, and improve the phenomenon of drooping corners of the mouth. If you want to improve the phenomenon of downward curved corners of the mouth, you should go to a regular hospital and choose the appropriate way under the guidance of the doctor. After the surgery, you need to pay attention to your daily diet and avoid spicy and irritating food, so as not to stimulate the wound and affect the recovery.