Vaginal discharge, or leukorrhea, is a mixture of vaginal mucosal exudate, cervical canal and endometrial gland secretion, and is related to estrogen secreted by the ovaries. If there are abnormal leukorrhea, thick snot-like, purulent, or soya bean dregs, you should consult a doctor in time, whether it is caused by inflammation of the vagina or the cervix or uterus, and after a clear diagnosis, the doctor will give timely treatment in a targeted manner. Glands in the normal cervical mucosa secrete alkaline mucus, which forms a mucus plug to block the cervical canal and play a protective role in preventing vaginal bacteria from entering the uterine cavity. The composition and shape of the mucus plugs also change in response to hormonal changes in the ovarian cycle. During ovulation, the mucus is thin and egg-white, which is favorable for the passage of sperm; after ovulation, the mucus becomes less viscous and thicker, blocking the opening of the uterus, in order to protect the fertilized egg in the uterus once the pregnancy is able to develop and grow normally, and free from the interference and influence of the upward movement of the vaginal flora. Throughout pregnancy cervical mucus plugs block the cervix to protect the fetus from growing and developing in a favorable environment within the uterus. Before labor, there may be a lump of sticky discharge with blood (i.e., redness), suggesting that the cervical mucus plugs are coming off, the mouth of the uterus is opening, and labor is imminent (i.e., a precursor to labor). There is no need for any treatment at this time, just observe when regular and painful contractions occur, then labor is officially imminent, and you can go to the hospital to prepare for delivery. If the red color occurs before 37 weeks of pregnancy, it suggests the possibility of preterm labor, and you should seek medical attention as soon as possible.