Flat face can be improved by surgical treatment, facial fillers and make-up to enhance the three-dimensionality. 1. Surgical treatment: If flat face is caused by bones, you can go to plastic surgery or maxillofacial surgery for orthognathic surgery, or you can do surgery for facial contour. Generally speaking, flat face can be changed well by surgery, pay attention to hygiene after surgery to avoid infection. 2. Facial filler: If flat face is caused by soft tissue deficiency, some soft tissues may be concave and convex due to developmental problems. In this case, facial fillers can be used to improve the flat face, such as choosing hyaluronic acid or autologous fat and other biological materials for filling. 3. Makeup: Flat face can also be improved by makeup. Skillful use of face retouching and highlighting can make flat face three-dimensional from the bone phase. It is recommended that people with cosmetic needs go to regular hospitals for treatment to avoid irreversible damage.