My 14-year-old son has been running a lot to get in shape for hockey season. He has been suffering from pretty bad knee pain because he hasn't taken a day off (which I am now making him do.) A friend who sells the patches put a few on his knees, and no joke, the next day, he had no pain. He had been struggling with knee pain for weeks and trying to run through the pain. He laughed when he told me that the pain was gone because we had all been pretty skeptical of these patches. Now I've decided to try them on some of my joint pain. I'm still not sure how I feel about them, but I was shocked my son's pain is gone and curious how they work on my own joint pain.