I have always been curious how do these foot pads work. I finally got a chance to try them on. They are not magic but they do help. I see the effect more obvious because I had my right ankle sprained quite seriously half a year ago. My ankle swells and sores still especially at night and in the morning. I used the foot patches 3 nights in a row. I noticed the swell was gone the next morning. It was even more noticeable the 3rd time. The patch did turn black, moist and a bit sticky after use. I just simply wiped my foot with a wet towel.
Although they will not cure my injury, the foot patches do help calm the swell of my foot. Best of all, I feel light in the morning. Worth a try!