The brown color of women’s leukorrhea is usually caused by gynecological diseases, such as cervicitis, cervical polyps, cervical cancer, intrauterine device, endometriosis and many other factors. In women with cervical erosion of moderate degree or above, the glans of the male penis rubbing the cervical area during sex can cause injurious bleeding, so it can lead to brownish leucorrhea. Cervical polyps are also a common cause of brown leucorrhea in women. Due to the long-term stimulation of the cervix by chronic inflammation, single or multiple polyps with tips can grow at the mouth of the cervix, which are very brittle and bleed when touched, and after bleeding, they will stagnate and suppress in the posterior vaginal fornix, which will be caught in the leucorrhea over time, causing the leucorrhea to look brown. Endometriosis is also a cause of brown menstruation. If the endometriosis grows in the cervical area, it will appear as a blue-purple nodule and the amount of bleeding is usually small, with a small amount of dark red bleeding mixed in with the leucorrhea to make it brown. Because bleeding after sexual intercourse or brown blood in the leucorrhea is an early symptom of cervical cancer, because there are more small blood vessels in the lesions of cancer and they are also more fragile, so they can bleed easily on their own and cause the leucorrhea to be brown. It is crucial to find out the cause of leukorrhea and treat it actively in time. After finding out the specific cause of the disease, treat it timely and don’t delay the small problem into a big one.