Can take several weeks for some to get used to. Try as many different mask as you need to. You usually have 30 days to try all different kinds to get one that works best. And even after 30 days you can still change. Change your supplies as often as you can. Usually a new mask every 3 months. Also you can use a ramp mode so the pressure starts out lower while you fall asleep and then goes to full pressure. Good luck!