Stained skin patches are spaces of the skin that change tone. Probably the most widely recognized reasons for dim patches on the back are aggravation, injury or disease. can likewise create because of inconsistency in the melanin levels. Melanin is the substance that gives tone to the skin and shields it from the sun. At the point when melanin is created at levels higher than typical in a specific level in a particular region, it brings about skin discolouration.