4 mo user of auto pap machine, having some uncomfortable sensation in lungs, right side during exertion above casual walking. Had first follow up after getting machine with neurologist but he referred to pcp. 2 months ago, this 46 yo had precautionary mid life test of heart and first colonoscopy alll found no problems, then I started teh auto pap machine. Almost like a burning low level, discomfort sometimes centrally located.