So every time you put on those old sneakers and your feet perspire, you could be re-infecting yourself. Dr. Hammonds suggests that clean socks should be worn with tennis shoes and that the shoes be sprayed with disinfectant or anti-fungicide between wearings. Socks and shoes may also be dusted with moisture-absorbing powder. Depending upon the cause of the infections, some of these remedies have ingredients that are ineffective at best and dangerous at worst. A break in the skin on the foot is a gateway for bacteria to enter the body.
Bare feet are especially vulnerable to puncture wounds, foreign objects and infection.
Better yet, wear some kind of foot covering or shoes. Examine your feet regularly for cuts or signs of fungus. Keep anti-fungal spray or powder in your locker. Sandals or other casual footwear may be fine for occasional wear, but your feet need proper support. If you are planning an outing where a lot of walking is required, choose more appropriate shoes.