It could be infected hair follicles. Infected hair follicles are just pimples. They can get big, they can be painful, and they can pop. So nothing there sounds too out of the ordinary. Some people break out on the face, some on the shoulders, some on their back, some in the pubic area.
Like danny said, razors can sometimes do a bit of damage down there too.
Getting a second opinion is never a bad idea though. Even if the second doctor says the same thing, maybe he or she will actually talk about with you and maybe even be able to give you a cream or something.