Dandelion is a bitter cold product, mainly with the function of clearing heat and detoxifying, dispersing nodules and eliminating galls. Lung nodules are tangible evil, phlegm-heat stagnant type of nodules, drink dandelion water, there is a certain effect. However, when treating pulmonary nodules, Chinese medicine must be identified as follows: 1. in favor of qi stagnation: it should move qi and dissolve phlegm, resolve depression and disperse knots; 2. in favor of phlegm: it should dissolve phlegm and disperse knots, mainly including hemp, Chen Pi and white mustard seeds; 3. phlegm-heat: using dandelion to clear heat and disperse knots has certain curative effects. In conclusion, for lung nodules, dandelion should not be used across the board because it is cold, and if a person with a deficient spleen and stomach, or a patient with a cold, yang deficient constitution, using dandelion in large quantities for a long time can hurt the stomach and defeat it, leading to a deficiency of yang, so long-term use is not recommended.