Hi, I am new to this board so I hope this is okay - I have suffered from what I believe is ME for years - though I started in 1980's and noone believed me here in New Zealand then. One result of it is rather strange. When flying and we have reached the cruising level and they pressurise the cabin and then cut down on the oxygen circulating, I pass out. I can be revived by breathing in more oxygen. For example I have found I will pass out if driving over a high mountain pass (as a passenger!) - 4 to 5 1/2 thousand feet is my limit now. Fying is now out for me unless I have my own oxygen, though travelling by boat is great! One doctor once said to me that maybe I am not absorbing enough oxygen from my blood. (?) Has anyone suffered from this? Any ideas? Thank you.