Vitiligo is a skin disease causing the loss of pigmentation in which patients develop white spots in the skin.白癫风是一种皮肤病，其患者皮肤失去天然颜色，产生白色斑点。I have a skin disorder, it destroys the pigmentation in my skin.我患有一种皮肤病，破坏了我的天然肤色。The doctor said permanent dermal pigmentation is a form of microsurgery.医生说永久的皮肤染色是一种显微手术。The dark pigmentation gives protection from the sun's rays.深色色素保护皮肤免受阳光伤害。