Cooling blood is a kind of medicine that is cold and cool, to make the blood with heat and running too fast return to normal operation, so as to avoid bleeding caused by blood running too fast.

According to Chinese medicine, blood heat is yin deficiency due to excess of yang in the body. Blood-heat leads to dryness, high internal heat, fever and bleeding symptoms, such as skin patches, epistaxis, toothache and so on. In this case, it is necessary to cool the blood. Traditional Chinese medicines such as Cortex Moutan, Rhinoceros horn, Radix Paeoniae Rubra, Radix Rehmanniae, Radix Scrophulariae, Radix Arnebiae, and Indigo Naturalis have the above functions, clearing away heat and cooling the blood.

Cooling blood is also a therapeutic academic language. It is one of the methods of clearing heat. It is a therapeutic method to clear blood and divide heat evil. It is suitable for heat entering blood, forcing blood to rush, or disturbing the mind by heat. Symptoms include hematemesis, epistaxis, hematochezia, hematuria, purple spots on the skin, delirious delirium, crimson tongue and rapid pulse. Commonly used drugs include Radix Scrophulariae, Radix Rehmanniae, Cortex Moutan, Radix Paeoniae Rubra, Rhinoceros horn, etc., such as Rhinoceros horn Dihuang decoction.