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Skin Discoloration CenterSkin discoloration results from several factors. Some are natural, such as birthmarks. Others are related to factors such as sun exposure (e.g., disseminated superficial actinic porokeratosis, hyperpigmentation) or allergy or immune reaction (lichen planus). The skin can become darker (e.g., acanthosis nigricans, progressive pigmentary purpura) or lighter (albinism, vitiligo). Health Guides
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