We can't all have that elusive thigh gap! And for those of us with muscular upper legs, chafing happens. That rubbing between the thighs can cause uncomfortable irritation and redness. To remedy the problem, keep a friction-minimizing product on hand like Gold Bond Friction Defense ($6). Baby powder also works in a pinch. These products are also perfect to keep thigh sweat at bay (try it on the backs of your knees).