I noticed a couple of days ago a large and very dark rusty colored spot on the bottom of my right foot. It has not faded in color with washing or scrubbing. I have tried soap, alcohol, and a pumice stone. Since then I have developed a little lighter and smaller one on the bottom of my left foot, as well as some smaller ones developing on my toes and heels. The largest of them looks to be very fake, almost as if I stained my foot. Since this has happened I have also had pains in my ankles radiating up my legs that could or could not be related. I am very confused as to what this could be as it seems to be spreading and not coming off or going away. As a side note, I had a c-section 7 weeks ago, hormones?