If a beautiful woman with long eyes and a half-hidden face suddenly lifts her veil, revealing her maw and rotten teeth, it won't be a big spoil the fun. This can only be a pity. Therefore, the beauty of the five senses is indispensable, and we should pay attention to the relative relationship. The relationship between maxilla and mandible, the development of mandible and the whiteness of teeth all affect the beauty of the lower third of the face. Besides these, the beauty of lips can also be seen from the size, thickness and shape. In terms of size, cherry small mouth is often used to describe beauty. How big and how small? In fact, it must also match the face. The general standard is that when the eyes look up, they can take the vertical line of the pupil as the standard. Beyond this line, it is too big, which is not very helpful for the size of lips and cosmetic surgery. The big mouth is small and the corners on both sides will become zippers. It is possible to enlarge the small mouth. In burn reconstruction surgery, the mucosa between the mouth and mouth is often turned out, which makes the small mouth bigger, but the scar of the mouth corner is not easy to hide completely. Thinning of thick lips is the most common lip surgery, and the effect is ideal, and the scar is not easy to be exposed inside the mouth. Be careful. If the thick gums of the upper and lower jaws are too abducent and the upper and lower lips are too much removed, it will lead to incomplete mouth opening and frequent grin. This situation should be corrected by the dentist first. Surgery is often not needed after correction, and the lips are not thick. Thin lips become thicker, so-called plump and sexy "Paris lips", we can consider injecting autologous fat or collagen, but because of uneven absorption, it is not a perfect method. If the size and thickness are moderate, it is still not enough to form an ideal lip. In terms of shape, it is often described that lips have no shape. Careful analysis of the shape of this lip shows that there is an arcuate line under the upper lip, which is called Cupid Bow. As the name implies, Cupid's bow must be very important. Without it or a slight flaw, the whole lip shape will be greatly reduced. The lip on the bow is called "lip bead". In fact, the upper lip of labial muscle is divided into three sections, and the lower lip is composed of two sections, which is clearly indicated in Leonardo da Vinci's human sketch. The destruction of Cupid Bow and lip bead is common in patients with cleft lip. In the reconstruction and plastic surgery of rabbit lips, the reconstruction of Cupid arch is very difficult. However, most people put too much emphasis on "lip bead" and often use so-called small needles for beauty, injecting liquid silica gel or paraffin, causing lumps or sequelae; Not enough, a moderate amount of autologous fat may be feasible. In recent years, the medical profession has adopted the method of "tattooing lips", which is taken properly and the effect is satisfactory.