What Causes Inner Labia Pimples With Itching?

Hi I am 29 and I noticed some small pimples on the surface of the inner labia. They look like the villi on my tongue. The labia is very itchy. My doctor has prescribed Triamcinolone Acetonide Ointment, but this did not help. They say is probably not an STD. They don't know what I have. What do you think I have?