It is normal to have leukorrhea, a female vaginal secretion that accompanies women throughout their lives and whose formation is related to hormonal action. Leukorrhea is a mixture of vaginal mucous membrane exudate, cervical canal and endometrial glandular secretion. Normal leucorrhea is white paste or egg white like, sticky, without fishy odor and small amount, called physiological leucorrhea. It is also known as normal leucorrhea. The amount and texture of leucorrhea secretion is influenced by the level of estrogen and progesterone in the body and changes periodically with the menstrual cycle in terms of quantity, thinness and consistency. After menstruation, the amount of leucorrhea is small; during ovulation, due to the vigorous secretion of cervical glands, the leucorrhea increases, transparent, slightly sticky, egg-white like filament; 2 to 3 days after ovulation, the level of estrogen in the body begins to decline, the leucorrhea becomes cloudy, thick and sticky and the amount is small. Before and after menstruation, leucorrhea often increases due to pelvic congestion and increased vaginal mucosal exudate. In addition, when pregnancy and oral contraceptives are taken, leucorrhea will also increase, and the reason for this is also related to the change of estrogen and progesterone levels in the body. Therefore, leucorrhea is a normal physiological phenomenon. To observe whether the leucorrhea is normal or not, we should look at the quantity, color, quality and taste of the leucorrhea. If abnormal leucorrhea occurs, it is necessary to go to the hospital in time to check the routine leucorrhea to see if there is vaginitis, and then give symptomatic treatment.