Dorsal furuncle is a general name for slow on-set negative sore and ulcerative diseases which has a wide range of research such as bone-attaching abscess,gangrene of digit,abscess,flowing phlegm,gravitation cold abscess,hyperplasia of mammary gland,bump and cancer.Commonality of multiple diseases becomes the key to treat the dorsal furuncle by ancient doctors based on treating different diseases with same method.Xiaojin Pills is a representative prescription for treating dorsal furuncle.This paper tried to explain the characteristics of pathogenesis in treating dorsal furuncle by Xiaojin Pills and compared the characteristics of different prescriptions in treating dorsal furuncle,which provides ideas for the clinical application of Xiaojindan in treating dorsal furuncle.