I have dry flaky white skin in my public area not sexually active! what could it be how to treat? what should i do in meantime?

Dry skin ? eczema: As you do not mention any redness/rash, I doubt this is a fungal problem. It is likely dry skin, perhaps even eczema, a chronic dermatitis often with an allergic component. Wash with clear water, and consider an OTC strength cortisone cream. The most important thing will be to get the skin moisturized, so use a non-allergenic moisturizer (Eucerin, etc), daily. Best wishes:)