Just one more thing... There are some fungus that can cause this symptom so if it isn't better in a day or two (you said itching was going away already so I assume it is getting better) then you should see a doctor. Don't try to self medicate yourself when it comes to that area though, you can really cause yourself some damage.
Sounds to me like a contact allergy. You might want to try changing your soap you wash with, the detergent you wash your clothes in and make sure you don't spray any feminine spray on yourself either. Use mild soaps or soaps without dyes and perfumes. If you like to take bubble baths that could be a culprit. Spend a few days pampering the area and not using anything that might irritate it (anything with dyes and perfumes). Ivory, dove and neutregena soaps might be good to try if you use something else. If it continues though, I would see a doctor.Why does my vagina have extra skin?
it could be anything but not much to worry about. it could be yeasat infection(I get those all the time) use this stuff called vaginal you can get at a dollar store or pharmacy. and eat lots or yogart and I know it sounds gross but take some PLAIN yogart and stick it down there it really helps, it was used like that to help these problems back in the olden days.vaginal itching