Mature teratomas, also known as ovarian dermoid cysts, are benign embryonal tumors that develop slowly. One of the following imaging techniques is commonly employed to evaluate these cysts: transvaginal ultrasound, pelvic ultrasonography, magnetic resonance imaging, or computed tomography. The two surgical methods most frequently used for removing persistent or very large cysts are laparoscopy and laparotomy. A 42 -year -old female, who is P3L1D2 with a history of previous cesarean section, presented with an abdominal mass that had been gradually increasing in size over the past five months. She also reported lower abdominal pain for the last five days. Upon further evaluation, she was diagnosed with a left ovarian dermoid cyst. The patient underwent exploratory laparotomy, during which a total abdominal hysterectomy with bilateral salpingo-oophorectomy was performed. The cut section of the gross cyst specimen revealed abundant sebaceous fluid and a large tuft of hair, which was confirmed by histopathology. The patient was followed up every three months for a year. Ovarian tumors typically manifest with nonspecific symptoms. The early recognition of dermoid cysts and prompt intervention are crucial to prevent potential complications.