Lactationalmastitis often occurs in younger primiparous women. Most cases occur between 3 and 8 weeks postpartum. If mastitis results in the formation of a breast abscess, surgical drainage is most commonly performed.We report a case of a large breast abscess in a primiparous 22-year-old woman, which presented 6 weeks postpartum. Catheter drainage was performed, with local antibiotics injection, and systemic antibiotic therapy was administered. Two weeks later, the abscess cavity is gone at which time the catheter was removed.That procedure in the treatment of breast abscess prevents unnecessary surgical treatment.