The skin dyschromia

The dyschromia skin - persistent violation of skin color. The dyschromia skin may be due to: 1) violation of formation and deposition of melanin pigment: hyperpigmentation (see Freckles, Chloasma) and depigmentation (see Vitiligo, Leucoderma); 2) the deposition in the skin pigment gemosiderina (see Gemosideros skin) and 3) of exogenous pigments (tattoo, impregnation). Causes of dyschromia skin diverse: radiation damage, chemical, including drug intoxication, diseases of the Central nervous system, endocrine system, chronic infections, genetic abnormalities and other Dyschromia skin may be diffuse (albinism, melasma) and limited (vitiligo, tattoo); a primary syphilitic Leucoderma) and secondary - pigmentation or depigmentation after skin rashes. Cm. also Pigmentation.