Herbs that cool the blood include ground elm, acacia, sapindus leaf, and bai mao root. The efficacy of Di Yu is to cool and stop bleeding (to cool and moisten the blood, preventing bleeding), and to detoxify and astringe sores. It is used for blood in the stool, hemorrhoidal blood, bloody diarrhea, collapse and leakage (excessive menstrual flow or dribbling) and other hemorrhages caused by blood heat in the lower Jiao. Sophora japonica is used for cooling blood, stopping bleeding, clearing the liver and diarrhea (removing liver fire). It is used in treating blood in the stool, leakage, vomiting, epistaxis and other blood-heat bleeding conditions. It is also used in treating swollen and painful eyes and headache caused by liver fire. Effects of Cyperus Rotundus Leaf include cooling blood, stopping bleeding, promoting hair growth, resolving phlegm and relieving cough. It can be used for hemorrhagic blood-heat, cough with lung-heat, hair loss with blood-heat, and premature whitening of hair. The effects of Radix et Rhizoma Cyperiata are cooling the blood, stopping bleeding, clearing heat and inducing diuresis. It is suitable for blood-heat hemorrhage, edema, heat drenching (burning and stinging pain is obvious when urinating, accompanied by frequent urination and urgency, and discomfort of traction in the abdomen), jaundice, lung-heat asthma and cough, and heat illness with thirst. Adverse reactions to Di-Yu, Sophora, Siphonophora, and Bai Mao Gen are not known. Where the deficiency of cold blood in stool, leakage, dysentery and bleeding with blood stasis people should be cautious of the use of ground elm; spleen and stomach deficiency and cold (spleen and stomach weakness and cold) and yin deficiency fever without real fire people should be cautious of the use of acacia; spleen and stomach deficiency and cold, urinating more than thirst is prohibited to take Bai Mao Gen, the side of cypress leaves of the contraindications for the time being is not clear. If you need to use drugs, should be used under the guidance of a doctor, do not blindly self-medication.