I have dark brown spots that have start appearing on the sole of my feet. They aren't painful... I don't think. I only have started developing some pain, but I have also started a job where I am on my feet for a prolonged period of time, which I know can cause pains. I also have Athlete's foot that I have been treating and started going away, but I think my nails my have become infected. I am trying to set a time aside to see a doctor, but I wanted to know if this is something that is fairly urgent. I have tried looking things up online, but there was simply way too much information and it became hard to understand.