The right side of my right foot, just below the little toe, where there is a natural lump or calloused area, suddenly became painful today, (feels like there is a rock under the skin), and now there is a deep blue bruise on the middle of the bottom of the foot, and the bruise wraps around to the front, across the lump area and below the little toe and the next bigger toe. I can hardly stand on it. I ve not been injured nor have I fallen nor wore tight or strange footwear.