What you can do to stop mouth breathing right now.
Close your mouth and start breathing through your nose. Try it right now. Does it make you feel anxious about not being able to get enough air? If so, just hang on for 5 more seconds. Take a breath in through your nose and let it out through your nose slowly. Don’t stop the cycle – breathe in again and let it out slowly. Congratulations. Your brain is starting to get used to this new way of breathing. Keep it up. Every time you breathe in through your nose and exhale through your nose, it gets easier and your anxiety about not having enough air will disappear. Keep going.
DO NOT ATTEMPT THIS if you have a physical obstruction in your nose that prevents you from nasal breathing.
What if you start breathing through your nose while you are sleeping? Does that mean you will stop snoring? Probably. If you had trouble with the exercise of inhaling through your nose and exhaling through your nose, it is probably because the muscles in your face and mouth have been programmed to take in air differently. No problem. Your muscles can be trained to respond appropriately when inhaling and exhaling through your nose. Stop waking up with a dry mouth.
Do you know if you are breathing through your mouth when you sleep? The biggest clue will probably be that you wake up with a dry mouth.