Teratomas do not get smaller or disappear on their own. Teratoma is formed during embryonic development, the specific cause of the disease is unclear, mainly related to the embryonic germ cell differentiation abnormality. Depending on the individual situation, it is recommended that patients suffering from teratoma go to a regular hospital for consultation and treatment under the guidance of a doctor. Teratomas come from germ cells and are commonly found in ovarian germ cell tumors. Teratoma is divided into benign and malignant. Ovarian malignant teratoma has a high metastasis rate and mainly spreads along the peritoneum, commonly found in the pelvis, liver surface, mesentery and other parts. Teratoma has no obvious clinical manifestations in the early stage, and most of them are found during physical examination. Teratomas are commonly found in the ovary, but may also occur in the skull, testis, sacrococcygeal tail and so on. It is mainly treated by surgery, and depending on the nature of the tumor, the need for postoperative radiotherapy and chemotherapy is decided under the guidance of the doctor.