Tingly Toes Foot Scrub gets its tingle from menthol crystals, the scrub from volcanic pumice. The scrub rubs away rough spots and callouses, leaving behind baby-smooth, reinvigorated tootsies. We recommend using the scrub at least twice a week to maintain its benefits. In addition, we also suggest using a professional-grade pedicure rasp daily for optimum results. To put an extra spring in your step, use the scrub periodically on your ankles and calves.