Oh my goodness, I have finally found a place where what I have been experiencing my entire life is discussed and talked about! I too have that feeling of oxygen starvation when so many breaths are not complete or full and that leave me feeling starved. And like all of you, it is totally random. Sometimes it disappears for weeks or months but then suddenly appears again and I have to force yawns to get that deep satisfying breath feeling. Sleeping is normal, I can exercise just fine, don't have asthma, have never had allergies, weight is good, sometimes slightly anaemic, not depressed and quite happy with life. So WHAT causes this? My chest gets sore from trying to expand enough to get air which must happen every few breaths. I can remember as a child laying on my bed and trying and trying to get that satisfying deep breath feeling. I will reread all the comments and wonder if the 'hyperventilating' one is one I should look into. Also, I'm interested in the breathing method of the first comment that helped for so long. Thank you all, and I hope this thread continues!