The leukorrhea is watery, colorless and odorless, which may be normal during the physiological cycle or caused by some gynecological diseases, and needs to be handled according to the actual situation. 1. Hormonal changes in the physiological cycle: In adolescent and fertile women, hormone levels change with the physiological cycle, of which the leukorrhea gradually becomes thin like water, colorless and odorless near ovulation, which is usually normal and shows cyclical changes with menstruation. As long as the period is regular, the color of menstrual blood is normal, and there is no serious abdominal pain or vaginal bleeding, then daily observation is sufficient without intervention or treatment. Daily rinse the vulva with water and dry it to keep it clean and dry, no need to use lotion frequently to clean it. 2. Hormonal changes in early pregnancy: due to the increase of estrogen level in women in early pregnancy, it will lead to an increase of vaginal and cervical secretions, making the leucorrhea become thin, slightly larger than usual, without odor, if the periods stop in the last two months, accompanied by nausea and vomiting, elevated body temperature and other manifestations, without other abnormal symptoms, you can go to the hospital 3. gynecological diseases: if the leucorrhea becomes thin, and the volume is obviously larger than usual and lasts longer, or accompanied by abdominal pain, unexplained vaginal bleeding, lumbar swelling and cramps, especially for postmenopausal women, the above symptoms need to be treated with caution, and may be related to vaginitis, ovarian cysts, early cervical cancer, etc. It may be related to gynecological diseases such as vaginitis, ovarian cysts and early cervical cancer. During the treatment period, it is recommended to quit smoking and drinking, exercise moderately, do not recommend intercourse and avoid spicy and stimulating food.