I had a small white pimple like thing on my nipple this morning. Not around my nipple but actually directly on it. I squeezed it and a white substance came out. It wasn't really wet.....more like the texture of dry mashed potatoes. That's the best description I can give of it. Is this something to be concerned about? I'm 40, not on birth control, have had 2 kids, youngest will be 10 soon, and I didn't breast feed either of them.