First of all, thank you very much Daniel for your earlier advice.  Will anything correct air going to one's stomach?

At least a few of us Cpap users get air in the stomach.  It is very uncomfortable to say the least.  I have had to walk the floor at night to try to relieve the painful pressure or cramps.  That is not great for a full nights sleep.  Some nights it is less severe, but I have concerns about the damage that may be done in time by air pressure in places it was not intended.  I have always "slept well" though the night (not knowing I had apnea).  When you are already tired, it is difficult to deal with something that makes you wake during the night feeling worse.  I will not wear Cpap because of the bloating.  

I have tried lower pressures and Cflex.  What are the alternatives?  On other posts they say the bipap does not work.  I have tried not sleeping on my back without Cpap and that has helped my apnea, as best I can judge by maybe 50% (I only get up once instead of twice to urinate which I have read is a physicological side effect of apnea and I do feel a bit better).

My experience with my sleep clinic is that no one understands or believes the problem or assumes it is something you can work through.  Those who have not experienced it seem to think you will get used to it.

I am told sleep studies mention bloating, but no specific studies have been done.  I am told that it goes to my stomach because I "swallow" air.  I wear the chin strap always, so I don't think my mouth is open.  There must be a reason that I have this problem and others don't, but no one has been able to supply the answer.  I want to get a good nights sleep and I would gladly wear the mask, but I am concerned and annoyed by the bloating.

Are there any other Cpap uses with stomach bloating who have found an answer?

I feel your pain. With my first mask(nasal pillows) and machine(cpap) I would wake up after 3 hours with extreme pain. Taking me a half hour before the pain turned to just discomfort. I tried taping my mouth shut with medical tape to make sure it wasn't from me opening my mouth. The tape stayed on and yet I still woke up 3 hours later with the excrutiatin pain. The doctor still wanted me to try a full face mask, which I did, and it helped in no way. I now have an autopap which has allowed me to sleep 4 hours(one hour extra) until the pain wakes me up. I have tried all combinations with and without humidification as well. I'm going to try sleeping without a pillow tonight to see if that works. Any advice is definitely appreciated.

I am not overweight. My air pressure level was initially set at 19 with the cpap. It is now set from 10 to 20 with the autopap. I hear from some people on this site as to how rare this is but yet I see many people posting about this problem. Although, most that post have mild gas at most. If anyone that has had severe gas pains as a result of *pap please let me know if and how you managed to aleviate the problem.

Sincerely,
Kevin

Thank you , Kevin, for sharing your experience.  I am learning more all the time, but I believe that there is no known solution for bloating.  Probably bloating is not uncommon.  From other comments many pap users experience it at some time or another, but apparently to a very low degree or minor annoyance, and it does not last long.  So our hope is that it will go away (or lessen) eventually.  How long have you been using pap?

During my quest for answers, I have learned that not only are my sleep tests skewed as I was told by my sleep clinic, but also now described as inaccurate.  This was my impression, but no one would acknowledge it until I got on this forum.  I still have a lot of unanswered questions.  I am going to an ENT this week.  

Have been searching the journal articles and thought I found something with sleep related "abnormal swallowing syndrome," but it appears that problem is unwanted movement from stomach to lungs, not lungs to stomach.  

Good luck, let me know if you get better.  LFA