1.The nostrils are flat, the shape is close to the horizontal flat circle is not good, this situation is common in Africa and Southeast Asia, Malaysia race, in our country to the southern people are also common. 2, another situation is that the nose is not beautiful affect the shape of the nostrils. The nose is not beautiful and can be divided into: nasal sagging, nasal hypertrophy, nasal shrinkage, nasal collapse and nasal narrowing, etc. The nasal wing droop is manifested as the nasal wing front, back or all nasal wing edge droop, side view may completely cover the nasal column, similar to the lion nose, mostly seen in yellow and black people, also often combined with nasal hypertrophy; nasal wing up shrinkage is mostly congenital deformity, appearing nostrils towards the sky; nasal wing collapse and nasal wing narrowing are mostly seen in Caucasians, mainly due to nasal wing cartilage and nasal lateral cartilage dysplasia. For those with simple nostrils that are too large, the preoperative design and delineation is to form a flap along the lateral nasal wing and the base of the nasal wing to the side of the nasal column, to fully loosen the tissues at the base of the nose and the nasal wing, to remove some of the tissues according to the actual cosmetic effect, then the nasal column and the flap, and the lateral nasal wing at the base of the nose are intermittently sutured. For another kind of nostril that is too large and the nasal wing of the nose is too large, it is necessary to remove part of the nasal wing tissue according to the large part of the nasal wing when designing the line before surgery. However, before suturing, the nasal wing is staggered by suturing the outer side of the nose, and the lowest point of the nasal wing is sutured with the outer tissue to lift the nose to correct the nasal wing and make the nasal wing and nasal column form a straight line, which is in line with the normal nasal base relationship.