Definitely doesn't only affect back sleepers. I sleep almost exclusively on my side. There are some very small masks including a type that only has two tiny "pi

Definitely doesn't only affect back sleepers. I sleep almost exclusively on my side. There are some very small masks including a type that only has two tiny "pillows" (as I understand they are called) that rest right up on/in your nostrils. Mine basically only covers my nose and has the hose on the top of my head so I can turn from side to side. I'm not sure that would be good enough for a stomach sleeper, but it might. I can see how being a stomach sleeper could make wearing a respiratory mask difficult, for sure.