Irregular menstruation needs to be differentiated and regulated with Chinese herbs. If the menstrual cycle is not normal, such as the first phase of menstruation, it can be treated by tonifying the middle Jiao Qi (treating qi deficiency by replenishing the spleen) Tang, Solid Yin Decoction, Two Earths Tang, etc., and if the second phase of menstruation, it can be treated by Angelica Digitata Drink, Dajian Yuan Replenishing Decoction, Warming Menstruation Tang, etc., and if the menstruation is irregular, it can be treated by Free San, Solid Yin Decoction, and other formulas. If the menstrual flow is not normal, such as excessive menstruation, Lift Yuan Decoction, Po Yin Decoction, and Loss of Smile San can be used, and if the menstrual flow is less than normal, Gui Kidney Pill, Nourishing Blood Soup, and Peach and Red Four Substances Soup can be used. If the menstrual period is abnormal, such as prolonged menstruation, it can be treated with Lifting Yuan Decoction, Two Earths Soup, and Fixing Essence Pill. The condition should be treated under the guidance of a physician.