Clinically, the watery leukorrhea is often due to the following reasons: 1, physiological leukorrhea, which can be seen during ovulation, due to the rise in estrogen levels during ovulation, leukorrhea secretion increases and is accompanied by the phenomenon of pulling the watery leukorrhea may occur.2, bacterial vaginosis, due to anaerobic bacterial infections may lead to thin leukorrhea, accompanied by a fishy odor of vaginal secretions.3, cancer of the fallopian tube, often also appears with lower abdominal pain, lower abdominal masses and other clinical manifestations, but usually no odor, Cancer of the fallopian tube, often also appears leukorrhea watery and accompanied by lower abdominal pain, lower abdominal mass and other clinical manifestations, but usually no odor. When the above symptoms occur, it is recommended to perform ultrasound examination to find out whether there are masses in the pelvis, and gynecological oncology examination to find out whether carcinoembryonic antigen is abnormally high, and if clinically suspected that the leukorrhea is abnormal, it should be examined and treated in time.