However, breathing through your mouth should be a routine which must be stopped immediately, first of all because only a small quantity of air that you breathe through your mouth reaches your lungs. Most of it goes directly in your stomach and it is not useful in any way to your organs. Also, many asthmatic associate breathing through their mouth with an emergency situation (like the imminence of an asthma attack) and when they get used with breathing through their mouth regularly, the fear of an attack is increased and the brain is always in a state of alarm.

Thus, in order to breathe normally and lead a stress-free life, you will have to get used to breathing only through your nose. It may be a little more difficult at the beginning, but nothing is impossible when you really want it. Start by auto-imposing yourself to keep your mouth closed and whenever you realize that you are using your mouth for breathing, close it and try to resume your normal activities and breathe through your nose. If this does not provide satisfactory results, then buy a mouth tape and use it when you are at home and when you are sleeping to keep your mouth closed. This will prevent you from opening your mouth and will only leave you the alternative of breathing through your nose.