Pigmentation is purely colouring of the skin. Ever wondered what those dark spots are? That’s pigmentation, caused by melanin.
Almost everybody has some level of melanin in their skin. This isn’t a concern until your body begins to generate unbalanced levels of melanin in certain areas. This can conduct to slightly darker or lighter patches of skin. The causes of irregular skin pigmentation vary widely, and nearly all people experience it on at least some part of their body.