These white spots can be due to vitiligo,lichen sclerosus especially if there are some hemorrhagic areas or blisters or candida
if a membrane is present that can be wiped away. . Keep the area dry, wear loose fitting clothes, and change undergarments at least twice a day. Most cases of fungal infection respond to over-the-counter products, which contain any of several basic ingredients: miconazole, tolnaftate, terbinafine,ketaconazole and clotrimazole.