There are many ways to nourish and protect the lungs, as follows: 1, drink more plain water, light diet, to keep the lungs and respiratory tract normally moist; 2, deep inhalation and exhalation to reduce lung damage, laughing helps to keep the respiratory tract open; 3, appropriate to increase physical exercise, you can practice yoga, swimming, taijiquan, five birds play, etc., do chest expansion exercises to increase lung capacity; 4, quit smoking, quit drinking, stay away from second-hand smoke. Wear a mask when you go out to avoid environmental pollution and haze damage, and avoid inhaling harmful gases; 5, eat more silver fungus, lily, honey, fungus and other nourishing food to moisten the lungs; 6, go to the park or green vegetation is more, sufficient oxygen content of the environment to breathe fresh air; 7, eat more vegetables, fruits, supplement vitamins and promote the metabolism of urine, spicy, stimulating food do not eat; 8, prevent colds, avoid cold air Stimulation, cross-infection, try not to go to public places.