What causes black skin?

Dark skin depends first on whether it is born or acquired. Parents with darker skin are more likely to give birth to children with darker skin. Of course, there are also many cases where children are born with darker skin than their parents. This may be related to genetic mutations. If the skin is white when they are young and later turns dark, the most likely reason is too much sun exposure. The most important determinant of skin color is the amount of melanin. Excessive exposure to sunlight for a long time will make melanin cells produce a large amount of melanin to protect the skin from sun burns. Skin will turn dark. This situation is most obvious in the exposed parts of the body.