Franny Runs Sore Feet

Well my feet are really bothering now. The top of my right foot was so painful today, I could not complete my 7 mile run, had to cut it short to 5 miles. I am soaking it now in ice water to keep the swelling down. Hopefully it will not get worse. I also have my first black toenail. My big toe on my left foot is totally black. I need to look that up and see what to do for it.