There are many reasons for a stream of leukorrhea, both physiological and pathological. During ovulation, changes in estrogen in the body can easily lead to increased vaginal discharge, which can also cause clear or streaky leukorrhea. Before menstruation, due to pelvic congestion, it can easily lead to increased vaginal and uterine secretions, which can lead to a stream of leukorrhea. The estrogen and progesterone in the body will also increase after pregnancy, which also tends to cause increased leucorrhea, but the increased leucorrhea caused by the above conditions will not cause leucorrhea odor. In addition to the above physiological reasons, some diseases can also lead to increased leucorrhea, such as vaginitis, cervicitis and cervical cancer, which can also lead to watery leucorrhea and a foul odor. Abnormal leucorrhea needs to go to the hospital in time for routine leucorrhea examination and gynecological examination to rule out inflammation or cancer and other diseases that cause it.