ObjectiveTo investigate etiology of granulomatous mastitis and it,s conservative treatment method. MethodThe clinical data of 120 patients with granulomatous mastitis given drugs for closed treatment plus massage dredge and ductal lavage from January 2011 to December 2012 in this hospital were analyzed retrospectively. ResultsOne hundred and one cases were cured following conservative treatment for 2 to 8 weeks,19 cases were underwent surgical treatment because of poor outcome.Nine of 101(8.9%) cured patients were relapsed for following-up of 30 to 42 months. ConclusionClosed treatment with drugs,which is effective,could keep patient with granulomatous mastitis from having mastectomy and reduce recurrence.