Sleep Apnea: is it common to have mood swings AFTER treatment?

Unfortunatly this is not from sleep apnea treatment, it sounds like he is a jerk. The symptoms you list are more common in pretreatment. I'm assuming he uses a Bipap or had a UPPP, there is also a chance that the treatment is not working. I think that what he really needs is counceling. What he is doing is more common in narcotics users which is also a possibility.

It's definitely depression. I am the same way I am actually a very gentle person so I break down easily if I am near people who don't treat me nicely. This happened when I was in a relationship with a bipolar guy, he abused me mentally and I got sick later (sadness, anger, uncontrollable shaking.) Did you know it has been estimated that 20% of illnesses, including mental illnesses, are due to contact with a destructive person. In extreme cases, nothing goes right. There are some people on this Planet that has inner demons so to speak, and you take on their own problems, that is why spiritual diseases are at an all time high and doctors cannot treat them, well except for meditation/prayer. I suggest you cut relationships that are destructive for your own benefit, and also read books on healing. Pema Chodron is a great teacher, she deals with chronic illness and helps us to heal ourselves.

What kind of treatment did he have? A lot of people I know who suffer from sleep apnea have a machine they use at night to help them sleep and it prevents sleep apnea. My husband used to suffer from sleep apnea, but since he received his machine several years ago he has been able to sleep through the night without his breathing stopping, and he wakes well rested. That is why I asked the question at the beginning.

He needs to see a doctor. No one on here can diagnose him correctly.