Lung cancer belongs to the category of lung accumulation and cough in Chinese medicine. Xiao Jin Dan cannot treat lung cancer. Xiao jin dan is a traditional Chinese medicine formula composed of wuling yu, myrrh and musk, etc. This formula has the efficacy of resolving phlegm, dispelling dampness, eliminating blood stasis and clearing up collaterals. It is effective in treating phlegm nuclei (lumps swollen up like nuclei under the skin), scrofula (mainly refers to cervical lymph node tuberculosis), yin gangrene (a general term for a class of slow-acting negative sores and ulcers), keloid scars, gastric cancer, and deep-seated abscesses. Its adverse reactions, contraindications and precautions are not yet clear. Judging from the efficacy and action of this product, Xiaojindan has no therapeutic effect on lung cancer, and if there is a need for treatment of lung cancer, it should be combined with the comprehensive treatment of the condition under the guidance of a professional physician. Before taking this medicine, it is necessary to be guided by doctor for identification and not to take the medicine by oneself, so as not to cause adverse consequences to the body.