If the teratoma is small, less than 5cm in diameter and does not cause pressure on the local organs and does not affect the function of the organs, it usually does not have symptoms and does not need to be treated. Most of the teratomas are benign tumors and generally grow slowly, if there is no abnormality, regular abdominal ultrasound review can be done. If the teratoma grows rapidly and the diameter is more than 5cm, it is easy to twist and cause acute abdomen, so if the diameter of teratoma is more than 5cm or malignant change, further examination is needed to confirm the nature of the tumor, and surgery can be taken to treat it.