I Use A Cpap And A Month Ago Changed To

I use a cpap and a month ago changed to a full coverage of my nose rather than air directly going in each nostril. The reason was an inflammation in my nostril, actually had a puss pocket. Now with the new one I'm having redness further into my nose. Any explanation would be appreciated, it is painful. Maybe it's not caused by the cpap. I've had it for three years and am just lately experiencing this problem.