The brown discharge below indicates a small amount of vaginal bleeding, which may be due to menstruation, or chronic cervicitis, cervical polyps and other diseases. 1. Menstruation: usually women’s menstruation on the first day of the month and when it is about to end, because the amount of menstruation is small, menstrual blood oxidized in the process of outflow, and then it will turn into a brown secretion, which is a normal physiological phenomenon. 2. Chronic cervicitis: this disease is caused by pathogenic microbial infections, commonly found in Neisseria gonorrhea, herpes simplex virus, Mycoplasma genitalium, anaerobic bacteria and so on. It can be triggered by factors such as vaginal foreign bodies and decreased estrogen levels. Most patients are asymptomatic, but some patients will have abnormal vaginal bleeding, which can be manifested as brown discharge from below. 3. Cervical polyps: the etiology of this disease is not yet clear, and may be related to chronic inflammatory stimulation, elevated estrogen levels, age, the number of births and other factors. A small number of patients will have abnormal vaginal bleeding, menstrual disorders, leukorrhea and other symptoms, so there may also be the case of brown discharge. There are many causes of brown discharge, so you need to go to the hospital and have a relevant examination to clarify the cause.