"Yu-ong" is similar breast abscess, tuberculosis of breast in western medical. It is exist an inappreciable difference. The incidence of Breast abscess has been gradually decreasing because of the development of antibiotics and improved life style, greater knowledge about health. Never the less breast abscessis occasionally found on clinics and effects the physical and psycholosical health of mother and baby. Tuberculosis of breast, is extremely rare and differential diagnosis from carcinoma, pyogenic breast abscess, in necessory. An inappreciable difference examine carefully.