Surgery on hairline can radically cure forehead stenosis: hairline is the dividing line between face and hair root, and its shape affects the coordination of five senses. In ancient China, it should be the ratio of "three courts and five eyes". The hairline, eyebrow line and nasal bottom line are equidistant, and a face is just five eyes wide. Generally speaking, the height is noble, the standard hairline is soft, the boundary with the forehead is clear and clean, and the forehead is not too high or too low. Hairline hair removal can get rid of the trouble of narrow forehead.