An organized hematoma of the maxillary sinus (OHMS) is a rare, benign lesion with locally destructive behavior. Although various clinical manifestations of OHMS have been reported previously, their associated complications and rapid progression have not yet been described. Herein, we report a case of OHMS that was further complicated by facial and orbital abscesses. Intensive treatment was necessary to prevent complications and progression of the condition. Korean J Otorhinolaryngol-Head Neck Surg 2016;59(2):150-4