Sometimes brown discharge may be due to ovulation bleeding, preeclampsia, ectopic pregnancy, gynecological diseases and other reasons. 1. Ovulation bleeding: some women have a small amount of endometrium shedding during ovulation due to large fluctuation of estrogen and progesterone, which is discharged along with vaginal secretions and manifested as brown discharge. 2. Pre-eclampsia, ectopic pregnancy: some women have a history of sexual intercourse and menopause, but sometimes there will be brown discharge phenomenon, which may also be due to pre-eclampsia, ectopic pregnancy and other reasons. 3. Gynecological diseases: when suffering from vaginitis, cervicitis, cervical polyps, endometrial polyps, cervical cancer, endometrial cancer, ovarian dysfunction and other gynecological diseases, it may also lead to the phenomenon of brown discharge from the vagina. After the appearance of brown discharge, it is recommended to go to the hospital in time for ultrasound of the uterine adnexa, cervical cancer screening, routine gynecological examination and other related items, to clarify the specific cause of the disease, and then follow the doctor’s instructions to treat the cause of the disease.