Objective To study the clinical efficacy of endotropic muscle-generating therapy in treating late-stage ulcerative granulomatous mastitis．Methods Sixty-three eligible patients were included in the western medicine group（31 cases）and the traditional Chinese medicine group（32 cases）．The western medicine group received conventional hormones and antibiotics,while the traditional Chinese medicine group received the endotropic muscle-generating method with adjustments．The treatment duration for both groups was six months．Disease regression,breast shape evaluation,clinical symptom observation scores,and other relevant indices of both groups were compared．Results The study found that the six-month cure rate in the traditional Chinese medicine group（56.2% clinically cured,34.4% cured）exceeded that of the western medicine group（35.5% clinically cured,29% cured）．Breast appearance evaluation in the traditional Chinese medicine group significantly better that of the western medicine group post-treatment,and clinical symptom scores were lower,demonstrating a statistically significant difference．Before and after treatment,there was no significant difference in the levels of immunoglobulins A,G,and M observed between the two groups．The traditional Chinese medicine group exhibited fewer side effects and higher patient compliance compared to the western medicine group．Conclusions The endotropic muscle-generating method,when employed to treat granulomatous mastitis in the late ulcerative stage,proves effective in promoting granulomatous wound healing,accelerating the generation of new granulation tissue,and improving ulceration and pus flow symptoms．Additionally,it contributes to the restoration of breast appearance．