Foot pads

These pads are amazing--my husband and I both really like them and I really think they are helping him tremedously. I believe that he is very toxic due to the type of work he does. He installs hardwood floors and the chemicals that they use to coat the floors with is horrible, and I know over the years he has gotten it on his hands, not to mention he has breathed in many vapors that you are supposes to avoid---you are supposed to wear a respirator when you use this stuff, and I have seen him do the floors without one because he thought it was a small floor and it wouldn't hurt him. Thank you for such a great product. after only using it a week I can already tell a difference in him. My question is this: After I used the pad the first time on my left foot only, I woke up with a sore throat on the left side of my throat---had some sinus drainage and my left leg felt like I had pulled the muscle in my upper leg in the back--did the pad stir this up or is it coincidence?