The composition of the nose is divided into four parts: the nasal root, the bridge, the tip and the wings. The nasal root is the bony part, which is composed of two nasal bones and the nasal prominence of the maxilla. The bridge of the nose is between the root and tip of the nose and consists of two pieces of lateral nasal cartilage on the left and right. The tip of the nose is the terminal part of the nose and consists mainly of two nasal cartilages. Each nasal cartilage has a medial foot and a lateral foot. The two medial feet form the nasal column and the tip part of the nasal scaffold below the tip of the nose, and the lateral feet separate to the left and right of the tip of the nose to form the two nasal wings, with the nasal septal cartilage on the side of the nasal cartilage. The external structure of the nose, from the nasal roots to the nasal columella, forms a prominent trigeminal cone. The skin covering the upper 2/3 of the nose is loose and elastic, so it is easy to stretch and expand the skin; the skin covering the lower 1/3 of the nose is attached to the subcutaneous tissue, so it is not so easy to stretch and expand the skin. Aesthetic values of the nose: Different nationalities and countries have different aesthetics, and the standards of the five senses are not the same. The perfect nose standard for oriental women should be straight but not stiff, straight but not flabby, the tip of the nose is slightly upward trend, and the back of the nose has a certain curved curve. 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 between the root of the nose and the outer canthus as the radius, which can show the basic position of the nose in the face. Chinese traditional aesthetic view of the second of the three courts refers to the length of the nose (from the center of the eyebrow to the tip of the nose for 1/3 of the face). 2, the 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 lcm, and the tip of the nose is about 1.2cm. 3, the height of the nose: the height of the root of the nose is generally considered to be no less than 7mm, the height of the bridge of the nose is about 11mm for women and 12mm for men, and the average height of the inner canthus (root of the nose) of a saddle nose is 4mm or even lower. The ideal height of the tip of the nose is generally equivalent to 1/2 of the length of the nose, 24 to 26mm for men and 22 to 24mm for women, below 20mm is a low nose. The frontal nasal tip line forms a triangle with the nasal bridge line and forehead, and the most depressed point of the nasal root is at the apex of this triangle. For high nasal bridge, the apex of the triangle is slightly above the line of the inner canthus of the eyes, and for low nasal bridge, it is below this line. Most people have the most depressed point at the root of the nose on the line between the inner canthus of the eyes. 4.Nasal dorsal line: generally parallel to the line from the ear wheel to the mandibular body. 5.Nasofacial angle: the angle between the forehead to the incisal line and the forehead to the nasal dorsal line, 30°~33° is the most ideal. 6.Nasolabial angle: the angle between the front of the nasal column to the bottom of the nose and the bottom of the nose to the red lip of the upper lip, generally 90°～120°. Saddle nose this angle is obviously increased, the length of the nose is obviously shortened, the nostrils appear to face the sky deformity characteristics. 7.Frontal nasal angle: the angle formed between the back of the nose and the eyebrows, the normal situation is about 120°. This angle is related to the beauty of the curve of the nose, less than 120° will look like the nose protrusion. If the position of this angle is high, will be a long nasal deformity, low is a short nasal deformity. 8.Nasal tip radius of curvature: the ideal nasal tip radius of curvature is 8 to 12mm, below 8mm and above 12mm are not ideal. 9.Nostrils are oval: the diameter does not exceed the medial foot of the nose. 10.Nasal width: the sum of the line connecting the two nasal margins at the upper part of the nasal small column is equal to the width of the vertical line downward from the inner canthus of both eyes. Special Note: The above aesthetic values are only a rough judgment of the nose aesthetics of some basic parameters, we can not mechanically understand or contrast, must be combined with the facial contour and other five senses morphology for analysis and contrast, and harmoniously deal with nasal cosmetic surgery. Nasal aesthetic curve: In the study of a person’s nose, the observation is not isolated nose, but from the forehead, eyebrows and eyebrow arch, through the middle structure of the face, then the nose, upper lip, jaw and chin for the overall observation. The nose can be characterized by the following aesthetic curves: 1. From the oblique position, it starts from the eyebrow or the arch of the eyebrow, extends down to the back of the nose, the tip of the nose, and then turns to the nasal column below, ending at the combination of the nasal column and the upper lip, forming a smooth “S”-shaped curve. 2.From the frontal view, the contour line of both sides of the nose starts from the arch of the eyebrow, runs along the nasal bone, the lateral cartilage, the outer edge of the nose, through the nasal sulcus, and ends at the point where the nasal wing meets the upper lip, sloping slightly inward, also forming a smooth “S”-shaped curve. 3.The curve on both sides of the nasal crest is connected with the contour line of the nasal tip, forming a “U”-shaped curve with a small upward opening, while the curve of the nasal tip is a midline symmetrical seagull wing-shaped curve. 4.From the side, the “S”-shaped curve with the frontal, nasal root, nasal dorsum, nasal tip, the combination of nasal tip and nasal small column, and the base of nasal small column as the connecting line fully expresses the three-dimensional image of the nose. 5.At the root of the nose, through the adjustment of light, we can obtain an “H”-shaped edge-like curve, the middle horizontal line of “H” is equivalent to the position of the root of the nose, which is the lowest point. 6, look at the shape of the nostrils is not beautiful. There are some people with big noses and small noses, the shape of the nostrils is often not coordinated, not to mention the beauty. The shape of the nostrils is also easy to be ignored by the doctor and lead to no modification, which will lead to the shape after rhinoplasty may not be as good as it should be