The forehead occupies the upper 1/3 of the face and is the more prominent part of the face. The strictly defined forehead is limited to the forehead, while the small forehead includes both forehead and temple. The ideal forehead means that the forehead is flat, slightly raised, and softly and smoothly transitioned to the root of the nose, its arc is beautiful and smooth, the angle of the nose and forehead formed is 135 degrees, from the forehead to the tip of the nose to form a soft and natural “S” curve. The full forehead is the part of the face that can best reflect the thinking, feeling and spirit of a person. The traditional Chinese aesthetic habits often associate the fullness of the heaven with wisdom, and believe that a full forehead not only exudes a healthy breath, but also increases facial beauty and reveals charming charm. The treatment of small forehead is recommended to adopt the method of frontal and temporal fat filling as the first choice, and hyaluronic acid filling as the second choice. The method of filling the forehead with allogeneic materials is less and less used nowadays. The common technical means are silicone prosthesis implantation forehead augmentation, expansion implantation forehead augmentation, autologous fat particles injection forehead filler, hyaluronic acid injection forehead filler, etc.