Feet typically have thicker skin (on the bottom), so it may require more dosage and/or frequency. Please note, we've been clinically proven for legs, but many have seen positive results elsewhere. Some other notes that might help: When you apply the product, please include the full muscle group, not just the typical point of cramping. For example, with your thigh, apply from the knee all the way to your hip/groin to cover the full length and breadth of the 4 parts of the quadriceps. Consider if you use other creams or lotions at the same time; they can act as barriers to our product working (even moisturizers, things like that)…something to be aware of. I have best results applying after a shower to dried, "clean" skin on my calves. You may need to consider more dosage and/or frequency. (For me, I use 5 to 6 pumps, let it dry, then apply again) We also recommend giving a little bit of "massage pressure" as you're applying the product. Keep rubbing it in until it is almost dry. Another point to keep in mind...wait for the product to dry before getting in bed, or putting on clothes...we've discovered that the fabric might be soaking up the product off the skin, reducing its effectiveness. Please don’t hesitate to reach out for more information.