Can this be used for poison oak and poison ivy in the vulva area?

Mild Cortisone: Use a mild cortisone over the counter cream for the vulva area. This skin is thinner here than other areas,so you just don't want to use a stronger prescription steroid in this sensitive area as it may thin the skin. You can try an over the counter antihistamine like zyrtec (cetirizine) daily to help control itchiness. If this doesn't clear up within the week, you may need a visit with your physician.