This article introduces and summarizes the ideas and methods of breast cancer.The author thinks that the basic pathogenesis of breast cancer lies in the“Yin Excess and Yang Deficiency”,the deficiency of Yang Qi,the insufficiency of Yang transforming Qi function,and the excessive“Yin formation”of cold coagulation,phlegm fluid,blood stasis and cancer toxin.With the accumulation of these visible Yin evils,breast cancer is caused by blocking the breast collaterals.It is suggested that warming Yang is the main treatment of breast cancer.At the s...