Circular pigments of skin inbweteen breasts, can pick some off and some have a darker outer centre, help?

Do you sweat a lot in that area? That happened to me a few years ago because I do sweat there, and it turned out to be a simple fungal infection. I know, it sounds gross, but it was really easy to treat once I went to a dermatologist. He gave me a prescription cream to put on it and it went away in a few days. I looked like a dang leopard when I went in, it had spread so much. Just a hunch, check with your doc.