Teratomas themselves do not cause pain, especially when they are relatively small, women often have no clinical symptoms. As the size gradually increases, the tumor pulls on the surrounding ligaments, causing abdominal discomfort, such as a feeling of abdominal heaviness, or even abdominal pain. Some women may also experience infection or adhesions with surrounding tissues, leading to abdominal pain. Additionally, some women may have malignant transformation of their teratoma, which invades surrounding tissues and nerves, possibly causing headaches. A small number of women may experience a change in the position of the teratoma after pregnancy or urination, leading to torsion, which can obstruct the blood flow to the tumor, resulting in necrosis and bleeding, causing acute abdominal pain.