Facial Flushing

For the last couple off weeks I've had facial flushing much of the time and some anxiety to go with it. I don't believe it's the mask ( the 432 which has been great for me ) as the redness covers all of my face as opposed to just in the mask area. I associate it more with nerves than a skin reaction but am not certain about that as I don't recall having it pre CPAP. Any ideas about possible causes ?

Was dianosed 4 months ago and had a septoplasty and turbinate reduction so I could use CPAP. Current CPAP status : After 2 months of use (100% compliance) during which progress required switching to APAP,going to full face mask to deal with mouth breathing...that was my 4th mask,using a Breathe Right strip each night,using a 10 foot hose with cover,and learning to side sleep, I am making progress. Awakenings are still an issue but I had insomnia along with the apnea for so many years I believe it's going to take a while to sort that out as far as being conditioning or others issues such as centrals,etc. Sleeping 6-7 hours. AHI ranges 1.0-1.7 and continuing to trend lower after starting over 5.0. Definitely feeling better and I thank all of you for your help. This site has been invaluable.