Pigmentation & Dark Circles
A change from your regular skin colour to a lighter (hypo-) or darker (hyper-) tone than usual is called pigmentation. While it can sometimes be cosmetically unappealing, when pigmentation is followed by trauma to the skin, it can leave behind further marks.
Exposure to sunlight is one of the major causes. However, pigmentation in areas like the neck, underarms, and other skin folds may point to a hormonal cause.
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