Shiny patches of skin
Unlike those hard and rough patches, another subtype of psoriasis can cause smooth and bright patches of the skin, especially in the skin creases and folds. This atypical form of psoriasis is called inverse psoriasis that commonly involves the groin, armpit, buttock, and breast areas. It is more common in people with obesity, metabolic syndrome, diabetes, or deep skin folds. Clinical trials have proven that rubbing, scratching, or excessive sweating can worsen the symptoms or make treating inverse psoriasis in these areas difficult.