Both uterine fibroids and endometriosis tend to proliferate in an estrogen-excess environment, so their co-occurrence rate reaches 30-40%. When fibroids cause heavy menstruation and anemia, the pain of endometriosis becomes even more severe. From the standpoint of Korean medicine, blood stasis (eohyeol) is the core pathology in both, so blood-invigorating, stasis-resolving prescriptions apply commonly to both. However, if the fibroids are large (5 cm or more) or anemia is severe, we proceed with obstetrics and gynecology treatment first, followed by supportive Korean medicine.