Regen55, I feel that you have to have the right Ionic foot Bath machine, because some of the cheaper one's do, do that, but this is a great question to ask the person you are getting it from. If they can answer your question and can explain how, when and why you should use their machine, then it can be a very positive experience. I know because I have a great machine and I use it on my self and my clients and I gotten great results. Just keep asking questions and feel which is right for you, remember if your questions are not answered by the person than they do not know their machine and all the benefits the Ionic Foot Bath machine can offer you! I hope this will help!