This could be sign of some infection or some sexual transmitted disease. I would say that I am suspecting on genital warts because I had them. My ex girlfriend has transmitted this annoying disease to me few years back. In the beginning it was only one white bump and I was thinking it is some kind of pimple so I didn’t pay much attention to that. But then one night during oral sex I have noticed that my girlfriend has the same thing on her vagina and off course I was sure that it is some kind of condition.
Next day I went to see the doctor and he diagnosed me with genital warts. It is sexual transmitted disease and the treatment lasted for a few weeks because they have spread in the meantime. The only way to get rid of this nasty disease is to visit your doctor and because they spread it is wise to do that as soon as possible.