The causes of ovarian cancer are still unclear, but environmental and endocrine influences are most emphasized among the causative factors. The danger of ovarian cancer is very great. Ovarian cancer leukorrhea is the appearance of watery rice soup or something like that. Abnormal leukorrhea is the most common symptom in ovarian cancer. The amount of leukorrhea varies when the patient is in the early stage of the disease. With the development of tumor, leukorrhea like watery rice soup can appear. If no attention is paid to it, it will lead to co-infection and accompanied by foul smell, which are all the manifestations of ovarian cancer in the early stage.