I've been through HBO twice. I had a rough time the first few dives and did quit, but after discussion with my doctors about the need to continue I did.

My doctors recommended using nasal spray before each dive, which did help. It took a while for me to get the breathing technique down, but once I did I didn't have any more problems with my ears and did not need tubes. For me the key was to use the breathing technique during the entire time I was diving and then at the end. My blood pressure also got higher with treatment which did make me a little light headed and my doctor put me on additional BP medication. Your vision could change as a result of HBO, but for most people it goes back to normal after you finish treatment.

If you had radiation to your jaw, it is very important to have HBO prior to any invasive dental treatment to avoid more serious problems in the future.

Best wishes!