Lips are divided into upper lip and lower lip, and when they are together, there is only one transverse seam, that is, mouth crack. The ends of the rabbit's lips are called spats. Lips are mainly composed of skin, orbicularis oris muscle, loose connective tissue and mucosa. There is a longitudinal groove in the middle of the upper lip with different degrees of development, which is a unique structure of human beings and a necessary factor for the beauty of the upper lip. The upper and lower lips can be divided into three parts: one is the skin part (also called white lips); The second type is red lips, which turn red when the lips are lightly closed. The skin of red lips is extremely thin, without cuticle and pigment, so red lips can be formed through the blood in blood vessels; The third is mucous membrane, which is a part of the oral mucosa inside the lips.
The length of a person can usually reflect the height of the skin of the mouth and lips, but it does not include the red lips. Generally, it can be divided into three categories: the upper lip is low and the height of the upper lip is lower than12mm; Medium,12-19mm; People whose height is often higher than 19 mm, and whose upper lip skin is lower than 10- 12 mm are not very attractive.
The side view of upper lip skin can be divided into three categories according to the degree of lip protrusion: lip protrusion and upper lip skin protrusion obviously; Positive lip, generally upright; Lip contraction means that the lips face backwards. Yellow people, such as Asians, have a straight lip, blacks, such as Africans, have a prominent lip, and whites, such as Europeans and Americans, often have a straight lip or a contracted lip.
Thick lips and thin lips, the thickness of lips refers to the thickness of upper and lower red lips when the mouth is gently closed. Some people are divided into four categories according to the average thickness of the upper and lower layers:
Small thin lips: the thickness is below 4 mm; ② Middle lip: 5 mm; ③ Thick lips: 9 ~12mm; ④ Thick convex lip: greater than 12mm. Because the thickness of the upper and lower lips is not exactly the same, and the lower lip is usually thicker than the upper lip, Japanese cosmetic medical experts believe that the thickness of the upper and lower lips should be observed separately. In their view, the standard value of female beautiful lips should be: upper red lip 8.2 mm, lower red lip 9. 1 mm, male 2 ~ 3 mm. The thickness of lips changes obviously with age. After the age of 25, especially after the age of 40, the thickness of lips can be significantly thinner. Therefore, some people say that "the thinner the lips, the more eloquent they are", which has no scientific basis. In addition, the difference of lip thickness between races is quite obvious. Africans have the thickest lips, while people in northern Europe and North Asia have thinner lips. At the same time, the thickness of the lips has a certain relationship with the nose type. Generally speaking, thin lips or lips with medium thickness are often related to narrow nose type, while people with thick lips are often wide nose type. In addition, according to the width of the mouth crack, it can also be divided into three types. Cherry has a small mouth and a narrow mouth below 35 mm, which is a beautiful mouth shape for women. The width of moderate oral fissure is between 36 and 50 mm, and most male and female oral fissures belong to this type; Wide-mouth crack is often greater than 50 mm, commonly known as big mouth, which is not beautiful in appearance and sometimes needs plastic surgery.
If you are in Guangzhou, I suggest you go to New Age International Plastic Surgery Hospital, which is the first professional plastic surgery hospital that is in line with international plastic surgery technology and the first plastic surgery hospital recognized by the International Plastic Surgery Society. You can consult the experts on the internet first.