Since I was a teenager, I started having small hard white formations on my face. They are approximately the size of a pimple, but they are deep and do not pop, or have an infection along with them. I am 36 now, and have about 10 of them on my face. What are they, and what do I do to get rid of them? I have heard they are calcium deposits, but why would my face be the only place they show themselves?