Brownish color at the beginning of menstruation is usually to be considered as having uterine cold and irregular menstruation. The normal color of menstruation is mostly light red or dark red. During menstruation, due to the natural drop in body temperature and cold limbs, it is easy to cause uterine cold, and the stagnant blood in the uterus will appear darker in color due to the prolonged accumulation of blood in the uterus. You should pay attention to preventing cold and keeping warm, wear more clothes and drink more brown sugar and ginger water to promote blood circulation in the body, which is conducive to the discharge of blood stasis in the uterus. Irregular menstruation, such as menstrual blood volume is too small, long stay in the uterus and vagina is not easy to be discharged, also lead to menstrual blood volume darkening, you can take oral medication to replenish qi, nourish blood and regulate menstruation, and usually need to strengthen the nutrition, and eat more high-protein and iron-supplemented food.