Because of different factors such as race, age, gender and heredity, the shape of lips also has different characteristics. Generally speaking, men's lips are thick and wide, and women's red lips are small and thin. Viewed from the side, the upper lip slightly protrudes from the lower lip and is slightly wider than the lower lip. The position of the squab is equivalent to the vertical line extending downward from the midpoint of the pupil when the eyes are looking up. When the lips are at rest, the height of the cleft lip is not more than 3mm.

Aesthetic data of adults' lips: the skin height of upper lip is 20-24.5mm, the skin height from lower lip to chin is 10- 13mm, the height of middle-aged people is18 mm, the height of upper red lip is 5-8mm, and the height of lower red lip is1.

The most common lip plastic surgery includes thinning of thick lip, thickening of thin lip, double lip plastic surgery, lip arch plastic surgery and lip bead plastic surgery. Thick lips and heavy lips need to remove a layer of lip mucosa in the mouth. On the other hand, after cutting off a layer of skin on the edge of the upper lip, the thin lip makes the red lip valgus thicker, and at the same time, it can form an obviously undulating lip arch. The prominent lip bead needs to be reconstructed with local red lip tissue. In addition, the skin between the bottom of the nose and the red lips is too long (medically called white lips) and can also be corrected by surgery. After lip surgery, it will recover quickly after short-term swelling, and generally does not affect diet and life.

The medical name of thick lips is heavy lips. People's lips are turned outwards, exposing some mucous membranes. If the lip mucosa is prominent, it will cause the lips to be too thick, giving people a simple and honest impression. Anyone who likes to chase after fashion knows that thick lips used to be a sign of sexiness. If the mucous glands under the lip mucosa proliferate and hypertrophy for various reasons, they will tend to fall down under the action of gravity. When talking or smiling, the normal labial muscles contract, forcing the mucosal tissue at the falling place to droop and evert, which will form a double lip deformity.

The most ideal way to correct the deformity of lips is lip plastic surgery, which is not very complicated and can usually be carried out in outpatient clinic. Taking the upper lip as an example, an incision with aesthetic radian is designed to make the lip bead of the upper lip become obvious after lip plastic surgery, adding aesthetic feeling. After suborbital nerve block anesthesia or local infiltration anesthesia, a fusiform incision is made on the inner side of the lip, and the width of the mucosa and submucosa of the lip should be 4 ~ 6 mm, and the longitudinal sections of the two incisions are at a certain angle. After the mucosa of an incision is removed, plastic suture can be done to make the thick lips thinner.