Great aunt is menstruation. The precursors of menstruation to be gone include the decrease of menstrual blood volume, the increase of brown discharge, the gradual reduction of menstrual cramps and other manifestations, which need to be analyzed specifically. 1. Decrease in menstrual blood volume: Before the menstruation is going to end, the shedding of the uterine lining decreases, resulting in a decrease in menstrual blood volume. 2. Increase in brown discharge: As the amount of menstrual blood is low, it does not flow out of the vagina in time, resulting in blood stagnation being oxidized, which is a precursor to the increase in brown discharge. 3. Gradual reduction of dysmenorrhea symptoms: As menstruation is coming to an end, the hormone levels in the body change and the symptoms of dysmenorrhea will gradually become lighter. There will be other precursors before the end of menstruation. If there is any abnormality, you must go to the regular hospital in time for examination, clear diagnosis and symptomatic treatment.