Why does my mouth open when I sleep sitting up?

Related questions

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2. Does ZQuiet help with sleep apnea?
3. Do chin straps help sleep apnea?
4. Do mouthguards help sleep apnea?
5. Do I have to use CPAP every night?
6. Will a CPAP machine stop snoring?
7. Do snoring mouthpieces work for sleep apnea?
8. What is the difference between snoring and sleep apnea?
9. Is it normal to still snore with a CPAP machine?
10. What is the best oral device for sleep apnea?

Tags

1. #tongue
2. #supporting
3. #throat
4. #oxygen
5. #support
6. #turns
7. #mouth
8. #against
9. #posture
10. #apnea
11. #muscles
12. #cause
13. #sleeping
14. #normal
15. #sleep
16. #airway
17. #breathing
18. #position
19. #airways