Traditional Chinese medicine believes that the essence of qi lies in the kidney and is unified in the lung and spleen. Protect the superficial fur, enrich the reason and make people have the ability to resist evil; Leading blood vessels inside, ascending and descending yin and yang, cycle by cycle. The seven emotions, cold and heat can affect qi and cause pathological changes, so there is a pathological phenomenon that qi is not divided into external causes and internal injuries, because there is a saying that "all diseases are born of qi" Mainly: strong gas, weak gas, smooth gas and gas disease. For this reason, there are many principles in treatment, such as invigorating qi, ascending qi, promoting qi and lowering qi. The disharmony between qi and blood will affect blood, especially the disorder of qi can cause diseases such as dampness and phlegm, so the combination of qi and medicine is often used to treat blood diseases and dampness.

Blood circulates in the body and nourishes the whole body. Deficiency, stagnation and mania are all symptoms. The causes of hematological diseases are either hot and cold stimulation, overthinking and fatigue, or prolonged illness, or excessive bleeding from knife wounds. Clinically, there are methods of nourishing blood, promoting blood circulation, clearing blood, stopping bleeding and removing blood stasis.