Ovarian teratomas, if without any complications, do not cause abdominal pain. Many people only discover the presence of ovarian teratomas during routine physical examinations. However, if a series of complications occur with ovarian teratomas, they can lead to abdominal pain. For example, the torsion of an ovarian teratoma, can cause the patient to feel sudden acute pain in the lower abdomen on one side. This pain is generally severe and unbearable and may also be accompanied by symptoms such as nausea and vomiting.