I don't know if you have a problem there or your shoes are rubbing (most of us don't have the same size or width in our two feet) or the socks aren't staying in place or what it is, but it doesn't sound like athlete's foot, which itches a lot. It would have a red rash. It's also called ringworm. Some people who are basketball players or runners get all manner of foot problems. Of course, the only way to get a true diagnosis is to see a dermatologist, or at least your doctor.