How do freckles form

In spring and summer when the sun shine most of the day a-large number of people have freckles. They are caused by the sunshine. It stirs a brownish pigment which normally lies in the deep layers of the skin and the pigment comes to the surface where it can be seen.
The skin is not just a thin jacket to cover the body. It is a complex organ with many functions. It has oil glands and sweat glands and very small roots from which hairs grow. It has blood vessels and nerves. Its thickness may be from one-sixth to one-fiftieth of an inch. The outer layer of the skin, called the epidermis, is thin tissue of cells constantly coming off. The cells grow in the lower layer called the dermis. In the dermis there is a brown pigment.
The sunshine brings a spot of the pigment from the dermis to the epidermis where it can be seen as a freckle.
Freckles disappear when old cells of the epidermis come off, and new cells which have grown in the dermis take their place.

Freckles are amazing

Freckles are small yellow spots on the skin that appear mostly on the face, the hands, but sometimes on the body. The cause of their presence is melanin which contains in the human skin.
Mainly red-haired and fair-haired people have them.
Usually children at the age of 5-6 have them and by 30 their number reduced.
Freckles are centers of concentrated tanning or a kind of protection, which protects the most important parts of the body from excessive light stimulation.
Until the twentieth century, it was believed that the pigmentation and dark skin are a sign of low social status. Farmers and traders had to spend a lot of time in the sun.
Periodically freckles become a beauty- trend and marketers use this to make money. For example, a decade ago, Lancome has released a pencil for drawing freckles.