Bad lung can cause cough, shortness of breath, chest tightness and other symptoms. If it is caused by lung yin deficiency, you can use lily flower, lotus seed, asparagus, maitake, snow fungus to make tea and drink it, and you can also use wood butterfly, which is good for the throat and trachea. If it is caused by lung qi deficiency, you can also use wolfberry, astragalus, licorice to make water to drink. If you often have a sore throat, caused by fire, you can also use honeysuckle, fat sea, dendrobium. There is bad digestion can also make some lemon water, you can also use chrysanthemum, dates, Chen Pi to make water to drink. In general, pay attention to diet, try to avoid eating spicy, irritating food, smoking need to quit smoking, to actively exercise to improve the body’s resistance, can prevent respiratory diseases.