chest soreness when getting up

i just started using a CPAP, after about 5 or 6 hrs of sleep i get a soreness in my chest that goes away in about 30 minutes after i wake up, does anyone know what is causing this. THANKS

No, but if makes you feel any better, I get it too.But only on my left side.

mark I will get it sometimes too, but only if I sleep on my back. If I turn onto my side it goes away. Does your CPAP have a humidifier? Mine does and I have wondered if sometimes it might be moisture. just a guess. I have had my CPAP for over a year, and find it a great help. good luck vicki