Pigmentation means discoloration. Pigmentation disorders affect the color of your skin. Melanin is responsible for the coloring of your skin. Special cells in the skin make melanin. When these cells become damaged or unhealthy, it affects melanin production. Depending on the pigmentation disorders, different parts of the face or body will be affected.
Periorbital dark circles (also known as dark circles or periorbital hyperpigmentation) are dark blemishes around the eyes. There are many causes of this symptom, including heredity and bruising.
Skin whitening treatments work by reducing the content of melanin of the skin. Many agents have been shown to be effective in skin whitening; some have beneficial side effects (e.g.: are antioxidants,nutrients, or decrease the risk of some types of cancer).