Cinnamon has the effects of tonifying fire, strengthening yang, inducing fire to return to the source, dispelling cold and relieving pain, promoting blood circulation and dredging menstruation. Chuanxiong effect: promoting blood circulation and removing blood stasis; Qi depression; Expelling wind and relieving pain. Vinegar Cyperus tuber: regulating qi and relieving depression, regulating menstruation and relieving pain. The combination of three drugs, warming meridians and dredging collaterals, dispelling cold and relieving pain, promoting blood circulation and removing blood stasis, is mostly used for irregular menstruation and dysmenorrhea caused by deficiency cold.