Forgot to mention turmeric -- mix ground turmeric with coconut oil to make a salve and apply. Anti-inflammatory and antifungal. But it does stain skin or bedclothes yellow so if that's a problem you may not want to use it topically, instead you can make a tea or use capsules of ground turmeric.
Just my experience: most effective remedy is chaparral leaf made as a tea and applied as a lotion (or mixed with coconut oil). It seems using it internally is strong and somewhat controversial, so not sure about that; but used topically it's a great healer for rashes and irritation. You can find a number of sources for it on amazon.
Eating high-oxalate foods can aggravate the problem for lots of women. Some good LC foods are also high-oxalate, including spinach, chard, blueberries, and other berries, plus many other leafy greens. I've read that kale is the lowest in oxalates of all greens, doesn't seem to cause problems. (Low-oxalate diet also prescribed for kidney stones, there are lots of lists on the net if you search for them.)
Just a note about the topically-applied yogurt treatment: I know that's what most people suggest but it really worsened symptoms for me. So you may want to try it when you have some quiet time first to make sure it's OK for you.
Also, often people suggest tea tree oil because it's said to be antifungal but it can also burn like crazy; Susun Weed for one says tea tree is too strong to use on sensitive skin areas.
Another thing: seems there are a lot of nerves "down there" (obviously), if you have a bout of itching it can really aggravate your whole system and make you feel frazzled. My favorite remedy for soothing nerves and healing up is skullcap tea or extract.
Good article by a herbalist about treating eczema and other skin conditions:
http://www.blessedmaineherbs.com/careofskin.html