Brown discharge without menstruation is caused by fluctuations in estrogen levels in the body during the pre-menstrual period. Normally, during the pre-menstrual period, estrogen reaches its highest level in the body and a sudden drop in estrogen concentration causes the endometrium to lose hormonal support, resulting in withdrawal bleeding, which is normal for menstruation. If mild fluctuations in estrogen occur before menstruation, this can cause a small amount of endometrium to shed causing a small amount of bleeding. After brown discharge appears before menstruation, menstruation will usually come soon. As long as the volume and duration of menstruation are within the normal range, it can be handled without treatment. The normal duration of menstruation is 3-5 days, and the bleeding volume is about 30-80ml. During menstruation, you should pay attention to rest, do not do heavy physical labor, and do not eat cold, stimulating food to avoid abdominal pain or changes in menstrual volume.