1, drink plenty of boiled water, have a light diet, and keep the lungs and respiratory tract normal and moist.

2, take a deep breath, exhale, reduce lung damage, laugh helps to keep the respiratory tract unobstructed.

3. Appropriate increase in physical exercise, such as yoga, swimming, Tai Ji Chuan, wuqinxi, etc. And do chest expansion exercises to increase vital capacity.

4. Quit smoking and drinking, stay away from secondhand smoke, wear masks when going out, avoid environmental pollution and smog hazards, and avoid inhaling harmful gases.

5, eat more white fungus, lily, honey, fungus and other foods that nourish yin and moisten the lungs.