Why do moles grow?

Moles can be said to be a kind of black spots on the skin that almost everyone has, but some people have more and some people have fewer. In addition to existing from birth, moles can also appear due to some reasons in the future. So, why do people have moles?

Moles are medically called nevus cells or melanocytic nevus. They are a manifestation of the formation of more melanocytes in the epidermis or dermis. Moles are divided into congenital and acquired. Congenital moles are related to genetics. If parents have more moles on their skin, their children may also have more. Acquired ones are mostly related to the living environment. For example, people who live by the sea are exposed to the sun for a long time, which causes changes in the melanin in their skin and can also form moles.

Depending on the location of nevus cells in the skin, pigmented nevi can also be divided into junctional nevus, mixed nevus and intradermal nevus. Junctional nevus usually grows at birth or shortly after birth. It has a flat surface, is hairless, and is light brown or dark brown in color. It occurs in random locations, but is more common on the palms, soles, glans penis, foreskin, and labia majora. . These moles are mostly composed of melanocytic mole cells. Compound nevi usually develop during childhood or adolescence. Compared with junctional nevi, they are more raised on the surface and sometimes have hair protruding from them. They are mostly dark brown or black in color and are more common on the face and arms. Intradermal nevus is more common in adults. It is a hemispherical protrusion on the skin surface. The color is not necessarily black. Some may be similar to the skin color. There may be one or several hairs in the center. It is more common on the head and neck. Most of these nevi are composed of neurotheca cells.

Melanocytes are actually factories that specialize in producing melanin. They are also responsible for packaging the produced melanin and sending it to their customers, the keratinocytes, which becomes an important weapon for them to resist ultraviolet rays. Of course, at the same time, our skin becomes darker. Since it is a factory, those who have taken high school politics classes should understand that in the tide of market economy, the productivity of a factory depends on market demand: if the market demand for a certain area of ​​the skin is very high (well, it is stimulated by something), then the melanocyte factory will begin to deliver a large amount of melanin packages to that area. These pigments are concentrated and deposited to form spots.

The above is a summary of why moles grow. I hope it will be helpful to you! For more information, please continue to follow the Dream Interpreter’s Fortune Telling Website’s Xiong Zhang account!