The composition of Blood Stasis Relieving Tang includes Radix Rehmanniae Praeparata, Radix et Rhizoma Rhei, Radix Paeoniae Alba, Radix et Rhizoma Gastrodiae, Radix Paeoniae Alba, Radix Paeoniae Mudanensis, Citrus Aurantium, Radix Angelicae Sinensis, and Rhizoma Polygoni Multiflori, and it has the efficacy of activating qi and activating blood circulation (promoting the operation of qi and circulation of blood), and eliminating blood stasis and relieving pain (eliminating blood stasis and relieving pain). The formula consists of eight herbs, including red peony, danshi and peach kernel, which are good at promoting blood circulation and eliminating blood stasis; Radix Rehmanniae Praeparata, Radix Paeoniae Alba, Radix Angelicae Sinensis, which are good at promoting and eliminating blood circulation and activating blood circulation; Herba Torticollis, which is good at promoting and eliminating blood circulation and activating blood circulation; Hovenia Citrus, which is good at promoting and eliminating blood circulation and activating blood circulation and eliminating blood stagnation. The combination of all the herbs can promote Qi and Blood circulation, eliminate blood stasis and relieve pain. This formula is often used in treating abdominal pain during menstruation and heavy menstrual flow with blood clots. Adverse effects and contraindications are not clear.