Simply put, fever or other reasons cause patients to have fever and bleeding symptoms, such as skin patches, epistaxis, toothache and other bleeding symptoms, which is called blood heat in Chinese medicine. 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.