The external shape of the nose differs significantly according to race, such as the high nasal bridge of Europeans and Americans, while the frontal nasal prominence of Easterners is generally broad and low. The frontal nasal prominence to the tip of the nose is nearly straight in men and slightly concave in women, with a slightly curved tip and a softer curve. Differences in the external shape of the nose give different impressions of the features. A straight and smooth nose gives people the impression of cleverness and beauty; a rough and straight nose gives men masculine beauty. Outside the nose bridge collapse, nose wide, giving people a sense of stupidity; nose bumpy curved, nose tip drooping, leaving a sinister, cunning, ferocious and fearful feeling. On the other hand, the shape of the nose of different races, the structure is basically the same, but there are certain differences in size. However, is it more beautiful to be bigger or smaller? It is not difficult to imagine putting a Western nose on a Chinese face or a Chinese nose on a Western face, both are obviously unattractive because they destroy the overall harmony of human form. The law of formal beauty will help to visualize the aesthetics of the nose and is equally instructive for nasal cosmetic surgery. The nose is located in the middle of the face. The median axis of the nose divides the face into symmetrical left and right sides, and likewise divides the nose into symmetrical left and right sides. If nasal trauma causes a crooked nose, the symmetrical beauty will inevitably be disrupted. From the hairline of the forehead to the lower edge of the jaw, divided into three equal parts, the length of the nose is exactly the middle 1/3 of the length, in line with the golden ratio. If the nose is too long or too short (such as hawk nose, short nose), it will destroy the balance and harmony of the nose. Congenital nasal defect, atresia of nostril after burn will destroy the perfection of the nose. Congenital saddle nose, hump nose, hinder the beauty of the curve of the nose. All of these can be corrected surgically to make the nose perfect. As far as the appearance of the nose is concerned, the more important points are as follows: 1.Nasal root height The nasal root height refers to the vertical height of the nasal root on the line of the inner corner of the two eyes, which can be divided into three grades: Grade 1 (nasal root height within 7 mm); Grade II (nasal root height of 7~11 mm); Grade III (nasal root height of 11 mm or more). 2.The length of the nose The length of the nose is generally 6.0~7.5cm. 3.The lateral shape of the nose The lateral shape of the nose is broadly divided into three categories, namely concave nose, straight nose and protruding nose. 4.Nasal tip According to the shape of the tip of the nose can be divided into three types: tip small (nasal tip pointed and small); intermediate (nasal tip size medium, round tip moderate); blunt round type (nasal tip fat blunt round). 5.Nasal base The base of the nose can also be divided into three types: upward, horizontal and downward 6.Nostrils The shape of the nostrils can generally be divided into three types, namely: square, triangular, and oval. The direction of the maximum diameter of the nostril can also be divided into three types, namely, horizontal, oblique and vertical. 7, nasal root point depression From the side of the nasal root point, it can be divided into four levels; 0 level (nasal root point without depression); 1 level (nasal root point slightly depressed); II level (nasal root point with obvious depression); III level (frontal bone connected with the nasal bone with obvious turn). 8, sinus (1) in terms of height, the nasal wing can be divided into three levels; low (the height of the nasal wing is about 1/5 of the nasal height); medium (the height of the nasal wing is about 1/4 of the nasal height); high (the height of the nasal wing is about 1/3 of the nasal height). (2) In terms of the height of the protrusion, the nose can be divided into three levels: not protruding (the nose is almost on the same plane with the side of the nasal bridge); slightly protruding (between not protruding and very protruding); very protruding (the nose is more fat and much more protruding than the side of the nasal bridge). (3) In terms of its relationship with the nasolabial folds, the nose can be divided into three types; nasolabial folds and nasolabial folds do not converge; nasolabial folds and nasolabial folds slightly converge; nasolabial folds and nasolabial folds are completely connected into a straight line. (4) With regard to the depth of the nasolabial fold, the nose can be divided into three kinds: inconspicuous, moderate and very obvious. However, a very perfect nose does not exist, and it mainly depends on whether the shape of the nose conforms to the characteristics of the ethnic group and whether the proportion in the overall shape of the face is harmonious. Some scholars classify the common noses in life into the following categories: 1. Ideal nose. The bridge of the nose is upright, the tip of the nose is round and broad, the size of the nose is moderate, and the nose is in proportion to the face, eyes and mouth. 2. Eagle hook nose. The nose root is high, the upper end of the nose bridge is narrow and protruding, the tip of the nose is tip-like and bent to the front into a hook, the nasal septum is retracted. 3. Garlic nose. The tip of the nose and the wings of the nose are rounded and large, and the shape of the nose and the nose is not obvious. 4. Pilgrim nose. The tip of the nose is located after the nasal wing, and the nostrils are visible to a large extent. 5. Small nose. The nose root and bridge are slightly low compared to the tip of the nose, and the tip of the nose is turned upward. 6. Small pointed nose. The nose is long and thin, the tip of the nose is thin, the nose is close to the tip of the nose, the expansion is not large. 7. Collapsed nose. The bridge of the nose is flat, the nose and the tip of the nose is large and open. According to the characteristics of our nation, some scholars have studied the parameters of national nasal beauty, which can be referred to. 1. The position of the nose in the face. Take the root of the nose as the center and draw a circle with the distance from the root of the nose to the outer canthus as the radius, the arc of this circle passes through the nasal column and the nasal wing margin, which can show the basic position of the adult nose in the face. For children, the arc of this circle passes through the corner of the mouth; for adults, it passes through the nasal column and the nasal wing margin. 2. The length of the nose. It accounts for 1/3 of the length of the face. 3. Width of the nose. The distance between the lateral edges of the two nostrils, generally equivalent to 70% of the length of the nose. The width of the root of the nose is about 10mm, and the tip of the nose is about 12mm. 4. Height of the nose. The height of the nasal bridge at the root of the nose is generally not less than 9mm, about 11mm for women and 12mm for men. The average height of the inner canthus (nasal root) of patients with saddle nose is 4mm. The height of the nasal tip: the general ideal height is equal to 1/2 of the length of the nose, 26mm for men and 23mm for women, and those below 22mm are low nasal type. The frontal nasal tip line forms a triangle with the nasal bridge line and the forehead line, and the most depressed point of the nasal root is at the fixed point of this triangle. For high nasal bridge, the apex of this triangle is slightly above the line of the inner canthus of both eyes, and for low nasal bridge, it is below this line. Most people have a depression at the root of the nose at the level of the inner canthus of the eyes. 5. Dorsal line of the nose. Generally parallel to the line from the ear wheel to the mandibular body. 6.Nasal face angle. That is, the forehead to the incisal line, and the forehead to the nasal dorsal line angle. The ideal nasofacial angle is 30 ° ~ 33 °. 7.Nasolabial angle. That is, the front of the nasal column to the bottom of the nose, and the bottom of the nose to the upper lip between the red lip intersection angle, generally about 90 °. Patients with saddle nose deformity, this angle is significantly increased, the length of the nose is significantly shortened, the nostrils appear to face the sky deformity characteristics. 8.Frontal nasal angle. That is, the angle formed between the back of the nose and the eyebrows. Under normal circumstances, this angle is greater than 120°, which is equivalent to the level of the upper eyelash margin and the inner canthus. This angle is related to the beauty of the curve of the nose, if less than this angle, the external nose protrusion; if this angle is higher, it is a long nasal deformity; if low, it is a short nasal deformity. 9, nasal tip radius of curvature. The ideal radius of curvature of the nasal tip is 8 to 12mm, 8mm or 12mm or more is not ideal. 10.The nostril is oval in shape and the diameter does not exceed the medial foot of the nasal wing. 11.The width of the nose. The width of the upper part of the nasal column, the sum of the two wing margins, is equivalent to the width of the downward vertical line of the inner canthus of both eyes. 12.Frontal and lateral view of the nose. It is a golden triangle.