Pigmentation
Pigmentation refers to the coloring of the skin. Skin pigmentation disorders cause changes to the color of your skin. Melanin is made by cells in the skin and is the pigment responsible for your skin’s color.
Hyperpigmentation is a condition that causes your skin to darken. This can affect patches of your skin or your entire body. Age spots, also called liver spots, are a common type of hyperpigmentation.
Hyperpigmentation is usually harmless but can sometimes be caused by an underlying medical condition. Certain medications can also cause your skin to darken. It’s more of a cosmetic issue for most people.