It is relatively normal to have brown leukorrhea after menstruation. Brown leukorrhea is mainly caused by blood remaining in the vagina as well as in the uterine cavity. It is mainly due to the blood left in the wall of the uterus, the uterine cavity and the vagina after menstruation, which is discharged with the cervical canal discharge and vaginal discharge, so there is brown discharge in the leucorrhea. The amount is usually small and is seen 1-2 days after menstruation and does not require special treatment. If fresh blood reappears as well as an increased amount, it is necessary to seek prompt medical attention to avoid the possibility of continued bleeding from the reproductive system. It is more common due to reproductive system infections, such as cervicitis and endometritis, and also due to uterine fibroids and malignant tumors of the reproductive system. Very few women in the early stages of pregnancy may also experience a small amount of vaginal bleeding, which will result in brown leukorrhea, and usually requires attention to any other discomfort as well as menstruation.