Radiation therapy and CPAP mask

Hi @mpearce1959 Sorry it took so long to respond. I have no personal experience with sleep apnea but I understand what is involved.
Three months after radiation (I am assuming radiation) means you are about one-eighth healed from the effects. It generally takes a good two years to fully recover after radiation therapy. After that point you likely will have internal scar tissue forever. These things alone can contribute greatly to sleep breathing difficulties as many of us can attest.
My experience, I slept upright initially, then with head elevated and always on my side for well over a year in order to breathe better at night. Never had a sleep study aside from my wife telling me I am sleeping better now and not choking.

Thank you. It’s good for me to hear how I still have a long ways to go in my healing process. I’m glad you’re sleeping better. Hopefully that’s the road I’m heading on as well. I appreciate your response.

Used a CPAP throughout my treatments without any issues. I used nasal pillows then so that may have helped with any irritation.

I have used a Full Face Mask for over ten years. I used it before, during and after my radiation, which ended October 2024. No problems whatsoever, especially considering the radiation affected my neck the most and my mask and its straps don't touch that area. So I would not worry about it, but try it out. If it doesn't work, try a nasal mask as others have suggested.