I was wanting to know how did you know that you needed oxygen while you slept? My current situation is that my sats are between 92-95% when I am up and about. I routinely wake up with headaches, that are of course worse when I sleep longer. They are not related to high blood sugars either because I always check to make sure. Some nights I will wake up several times, but not always because I am coughing my brains out. I mentioned the topic once to my docs about a year ago, but they did not seem concerned. Now I am to the point where I am just wondering. I of course do not want to do it, but I was still wondering what makes a person need it? Thank you for any feedback.