You could have a disorder called lichen sclerosus.
Lichen sclerosus is an uncommon condition that creates patchy, white skin that's thinner than normal. Lichen sclerosus may affect skin on any part of the body, but most often involves skin of the labia, vulva, foreskin of the penis, or skin around the anus.
Anyone can get lichen sclerosus, but postmenopausal women are at highest risk. Left untreated, lichen sclerosus may lead to other complications.
You may not need treatment because sometimes lichen sclerosus improves on its own. If you do need treatment, your doctor can suggest options to return a more normal appearance to your skin and decrease the tendency for scarring.
Just because you have lichen sclerosus, doesn't mean that you can't have a yeast infection too. You should see your gynecologist. Though lichen sclerosus is usually diagnosed based on the physical signs and symptoms, sometimes a biopsy is needed.