Deer heart blood is the blood drawn from the heart when sika deer or red deer are slaughtered. Deer's pains were first seen in Qingbo magazine in the Song Dynasty, and Li Shizhen recorded in detail in Compendium of Materia Medica in the Ming Dynasty: "Treat impotence, tonify deficiency, stop low back pain, nosebleeds, falls and rabies, treat lung flaccidity and hematemesis with wine, and take it when it collapses. Anyone who is in danger of gas pain will recover." Tonify deficiency, nourish essence and blood, relieve acne and drug toxicity. "Through modern clinical research, deer's painstaking efforts have cured palpitations, insomnia, forgetfulness, falls and anti-aging. The painstaking management of deer plays an important role in TCM clinic. It is also widely circulated among the people and used to treat rheumatism and rheumatoid diseases.