It is to introduce and summarize Professor LIU Lifang's experience on treating granulomatous mastitis.According to its clinical characteristics, such as dark skin or color, low skin temperature, flat and swollen sores, more blood than pus, purulent ulcerand long course of disease, Professor LIU Lifang believes that the disease belongs to Yin syndrome, which is very similar to the pathogenesis of Yin gangrene.The pathogenesis of the two diseases is Yang deficiency, phlegm and blood stasis.Yang deficiency is the root of the disease, wind, cold and dampnessinvasion, Qi stagnation and blood stasis, phlegm and blood stasis are the secondary causes.It is suggested to treat this disease with warming Yang method.Warming Yang method can makecold, phlegm coagulation, blood stasis and other pathological products normal gasification, so that it can gradually be warm and dissipated.Yanghe Decoction is the basic prescription.At the same time, the method of warming Yang to promote Qi to relieve depression, warming Yang to dissipate phlegm and mass, warming Yang to activate blood circulation to remove blood stasis, warming Yang to clear heat and detoxification and so on were comprehensively used in order towarmYang without retaining evil.Eliminating pathogenic factors is the purpose of strengthening the body.In addition, clinical cases are attached for the same purpose.