I've been using a cpap machine since 2007 and I have just noticed something I find very weird. I currently have a very bad chest cold with lots of stuffiness and coughing
(First cold in 9 years).
As soon as I put on my cpap mask, my symptoms go away completely. No more stuffed nose and no mòre coughing. But in the morning when I remove the mask, all the symptoms are back at full strength.
Maybe it's because of the constant air flow keeping the airway open so the mucas doesn't have a chance to build up.
I don't know about you but I find this very interesting.