There are many reasons for the flow of coffee-colored liquid from the vagina, which may be a physiological phenomenon of menstruation, or due to cervicitis, cervical polyps and other diseases. 1. Physiological phenomenon: Usually when women’s menstruation just comes, some people will be less due to menstrual flow and the performance of coffee-colored liquid discharge, is a normal physiological phenomenon. 2. Cervicitis: usually due to Chlamydia trachomatis, Neisseria gonorrhoeae and other pathogenic infections, and also related to hormonal imbalance, multiple sexual partners, early age of sexual intercourse and other factors. Most patients have no obvious symptoms, some patients will have increased vaginal discharge and abnormal vaginal bleeding, which can also be manifested as coffee-colored liquid discharge. Some patients may also have pain during sexual intercourse, lower back and abdominal pain and other symptoms. 3. Cervical polyps: the cause of the disease is still unclear, mostly considered to be related to chronic inflammation, cervical infection and other conditions. Usually patients are asymptomatic, a few patients may have excessive leukorrhea, bleeding after sexual intercourse and bleeding between menstruation, which may also appear to have the phenomenon of coffee-colored liquid discharge. There may also be other reasons for women to have coffee-colored vaginal fluid, so let’s rule out the physiological phenomenon first. If it is caused by a disease, it is necessary to actively seek medical treatment.