Hi Empress,This can be a common reaction to complete and utter relaxation - I have had it happen to me as well when I went for some in person group relaxation therapy and everyone was provided with blankets before we started; they told us that we would feel slightly chilled the more relaxed we became, and usually I am warm, but I did get chilled! - As long as this only happens when you listen to your sessions, and isn't an ongoing thing, which would perhaps indicate something else going on, this can be a normal response for some people when they find deep relaxation.Off hand, I would say to keep with the blankets, perhaps a heating pad on low as long as you wake up to turn it off before sleep, and see if that helps. If you ruled out any other possible cause, and this happens only when you listen, then the chills are not harmful. Do you warm up again once you have finished your session?I will ask Mike if he has any suggestions for you also - or you can leave a message on 877-898-2539 and someone will return your call if you feel you need more info.Hope this helps. Take care.