Sorry to be so crude but sometimes after using my CPAP mask I wake up and start burping and farting for hours, as if the machine has filled my stomach with air. OK I'm pretty sure that's what happens but why is that happening? Something's wrong surely?
That's rough. if the CPAP holds the sphincter open between your esophagus and stomach acid will get in the esophagus. It is not only painful it can cause other problems from pneumonia to cancer so you might ask your Dr for help - medicine or even surgery.