All humans have normal flora on their skin. Normal floracontains both bacteria and yeast. Both like warm, moist, and darkplaces, where light and air rarely touches the area. So, thegenitals and any place of skin folds are perfect places forcolonies. Likely body areas for folds are under the breasts, undera large lower belly, and anywhere the person has skin rolls.Typically, yeast is the biggest culprit. It can make those areasitch, and become reddened. Left unwashed, the colony grows. Leftuntreated, the proteins created by the yeast can cause intenseredness and itching. It can even break open the skin, which canbecome a serious wound.Ask your doctor about an antifungal cream. Wash with mild soapand rinse well. PAT dry, do not rub. Apply the cream as your doctordirected.