Northern Liu huinu and southern Liu huinu are two different kinds of Chinese herbs, which have different characteristics in terms of flavor, attribution and efficacy and main treatment. Northern Liu huenu has the effect of cooling blood, relieving menstrual pain, stopping bleeding, activating blood circulation, removing blood stasis, clearing heat and inducing dampness, and is often used in treating blood stasis and menstrual occlusion, and bruises and injuries. It enters the spleen meridian, gallbladder meridian, liver meridian and stomach meridian. It is bitter and cold in flavor. Bei Liu Huan Nu belongs to the blood-activating and blood-stasis-removing medicines to regulate menstruation, belongs to the dried grass of the plant Yin Xing Cao of the family Xuan Shen family. Southern Liu Huanu has the efficacy of breaking blood circulation and regulating menstruation (making blood stasis broken and menstruation smooth), astringing sores and subduing swellings, and is often used for bleeding from gold sores, menstrual obstruction and obstruction of the masses (women with lumps in the lower abdomen). It enters the spleen meridian and heart meridian. It is bitter and warm in flavor. It belongs to the family of blood-activating and wound-healing medicines, and is the whole herb of Artemisia absinthium in the family of Asteraceae. If needed, please use it under the guidance of a professional Chinese medicine practitioner.