When ovarian teratomas are small, they usually do not exhibit any clinical symptoms. When teratomas become malignant, they grow faster, and if too large, may cause women to experience abdominal distension and pain. The pulling of surrounding tissues can also lead to pain in the lower abdomen on one side in women. When ovarian teratomas are severely malignant, they can invade or compress surrounding tissues, leading to related symptoms like compression of the fallopian tubes, causing infertility; or compression towards the bladder, causing frequent and urgent urination in women. The texture of teratomas is uneven. In certain special circumstances, such as when a woman suddenly changes her position, torsion or rupture of the teratoma can occur, causing acute lower abdominal pain and other symptoms of acute abdomen. Additionally, in the late stages of the disease, symptoms such as emaciation and anemia can also appear.