Thanks for all the reponses. I use a nasal mask because I have nasal congestion and I think it helps to blow my nostrils open, similarly to how the cpap opens up the windpipe. I used to use full face masks, but they don't help with nasal congestion because the pressure is all around the nose. Have n...

Hi, I've been using a CPAP for 16 years (currently Resmed S9) with a Deluxe-style chinstrap: https://www.cpap.com/productpage/deluxe-chinstrap-mouthleak and the whole thing works great. However, I've developed some skin discoloration (seems to be permanent) on the sides of my neck below my jaw (dark...