What does fortune telling mean that the fetus is purple?

This birthmark is also called "birthmark" and is a kind of "pigmented nevus". It often occurs in the waist, chest and back, buttocks and limbs, and the color is mostly cyan or blue, which does not affect the baby's health and does not need treatment. Disappear within a few years after birth.

According to experts' research, the pigmented cells began to appear at 4-5 months of embryo, and gradually disappeared after birth 1 and 2 years; But there are also very few people who still have pigment spots in adulthood. Because this spot mostly appears on Mongolian people (that is, yellow people), it is anthropologically called Mongolian spot.

Because it often appears in the sacrum, it is also called sacral pigmented spot. However, this blue spot is also found in blacks and whites, except for sacrum and buttocks. Therefore, the above two names are not accurate enough in terms of the number of discoveries.

Professor Wu, a late anthropologist in China, observed and investigated the data of 9 5 3 newborns with Mongolian spots within 3 hours after birth. The incidence rate is as high as 94.6%, with little gender difference, and most babies only have one piece (66%). 2-3 pieces, accounting for 31%; There are also a few, as many as 10 pieces.

The birthmark is oval in shape, accounting for 40%; Irregular shape takes the second place, accounting for 31%; Other shapes are a minority. Spots vary in size, from small mung beans to large disks. Generally, boys have bigger spots than girls.

The birthmark color is inconsistent, of which light blue accounts for 34%; Blue-gray accounts for 32%; Light gray accounts for 26%; Other colors are rare. In addition, although it is common in sacrum and buttocks, it can also be found in back, chest and abdomen, upper and lower limbs and head and neck.

Usually, this pigment spot is larger and darker in shape than other parts of the hip and sacrum. The shape of a single piece is also larger than that of two or more pieces, but the color is slightly lighter.

Birthmark is not a disease, but a residual physiological feature of human body, which exists in any race, but its incidence is different. It also has a considerable relationship with people's eyes, hair color and skin color. Generally, among white people, baby relatives with this kind of mole and their own eyes, hair color and skin color are often dark; But in blond babies, this kind of blue spot is rare.

It should also be mentioned that apart from the most common "Mongolian spots", there are several kinds of human birthmarks: one is a light brown birthmark that is not higher than the skin; Because its color is similar to coffee mixed with milk, it is called milk coffee. This birthmark is harmless to human body. However, if there are many places (generally more than 6 places) on the baby, it suggests that the child may have a rare genetic disease-neurofibroma. There are also two kinds of birthmarks caused by blood vessels. First, purplish red spots or purplish red spots are more common in the head, face and upper limbs. Although this kind of spot sometimes shrinks, it is generally lifelong; The second kind is "strawberry nevus", which is a kind of growth that grows on the skin and is convex, uneven and dark red. This kind of mole will gradually increase at 6- 12 months after birth, and then gradually fade from the center of the mole and generally disappear in infancy. ?