Abnormal pigmentation is causes by the lack or access of melanin. There are many common causes of abnormal pigmentation such as pigmented birthmarks, macular stains, and hermangioma. There are also skin pigmentation disorders such as alinism, melasma, pigmentation loss as a result of sun damage and vitiligo. It is important to have your skin condition correctly diagnosed for proper treatment. Once the skin condition has been determined your skin specialist at ReNu can determine the best treatment by laser or skin care products.