Uneven pigmentation of the skin, where a patch of skin that appears darker than the surrounding area, is called hyperpigmentation. Hyperpigmentation occurs when the cells that create melanin, a natural pigment in the body that give colour to hair, skin and eyes, is activated either from being damaged or because they are unhealthy.
There are many reasons for the occurrence of skin pigmentation including hormonal changes in the body, overexposure to the sun, genetic factors and injury or trauma.
