Tinea versicolor is a common condition characterized by an overgrowth of fungus on the skin’s surface. Heat and sweating may predispose one to developing tinea versicolor and it usually occurs on the chest, abdomen, or upper back. The rash typically consists of scaly, sometimes itchy white and tanned patches and may be more apparent in those who are tanned. Treatment involves topical and sometimes oral anti-fungal medication.