Mudanpi and Ai Ye can be used together to cool blood, invigorate blood circulation and stop bleeding. 1. Peony Dan Pi is slightly cold in nature, bitter and pungent in taste, and belongs to the heart, sweet and kidney meridians. It has the efficacy of clearing heat and cooling the blood (relieving blood heat by clearing heat), activating blood circulation and removing blood stasis (promoting blood circulation and eliminating blood stasis in the body), and can be used in the treatment of heat entering into the camp and blood circulation (the degree of invasion of heat into the human body is deep, and the symptoms are more serious), vomiting of blood, epistaxis, bone vaporization in deficiency of yin, amenorrhea and dysmenorrhea, bruise, canker sore, swelling and poison. Mudanpi should be used with caution for people with blood deficiency and cold, menorrhagia and pregnant women. 2. Mugwort is warm in nature, bitter and pungent in taste, with small poison, belonging to the liver, spleen and kidney meridians, it has the effect of warming menstruation and stopping bleeding (warming the human body’s meridians and stopping bleeding in the body), dispersing cold and regulating menstruation, and it can be used externally to dispel dampness and stop itching, which can be used for hemorrhagic disorders, cold pain in the lesser abdomen (abdomen), cold uterus and itchy skin, etc.. Its adverse reactions and contraindications are not clear. The combination of the two can play a role in cooling the blood, activating the blood, stopping bleeding and so on. The above drugs need to be applied under the guidance of a professional physician, to avoid self-medication affecting health.