The term "blood deficiency" in TCM refers to the pathological phenomenon of deficiency of yin and blood in the body, which can be caused by excessive blood loss, or deficiency of yin and blood due to long-term illness, or dysfunction of the spleen and stomach, and Shui Gu's subtle blood cannot be transformed into blood. Because of the close relationship between qi and blood, blood deficiency is easy to cause qi deficiency, which can not be transformed into blood, and is also a factor in the formation of blood deficiency. The main symptoms of blood deficiency are sallow complexion, dizziness, palpitation, insomnia and thready pulse.

Blood deficiency is a manifestation of blood disorder, which refers to a pathological state of insufficient blood production or decreased blood nutritional function. There are many reasons for blood deficiency, which are described as follows:

Causes of blood deficiency: Excessive blood loss caused by trauma, menorrhagia or other chronic blood loss can cause blood deficiency syndrome. Because of excessive blood loss, it will lead to blood stasis for a long time, on the one hand, it will lead to rebleeding, on the other hand, it will affect the generation of new blood, thus aggravating blood deficiency.

Unhealthy diet: Overeating, hunger, partial eclipse, malnutrition and other reasons can lead to spleen and stomach damage, unable to produce subtle Shui Gu, insufficient sources of qi and blood, leading to blood deficiency.

Chronic consumption: overwork, serious illness, chronic illness, or sweating consumes yang and yin; Excessive labor is easy to consume qi and blood, and for a long time, it is qi deficiency and blood deficiency; Overwork can easily lead to yin deficiency and blood deficiency, and lack of heart and blood, which will lead to blood deficiency.

Clinical manifestations of blood deficiency

Blood is an important material basis of human life activities. It contains all kinds of nutrients needed by the human body and plays a nutritional role in various organs and tissues of the whole body. If qi and blood are deficient due to various reasons, a series of diseases and syndromes may appear, which can be summarized as diseases and syndromes caused by viscera dystrophy and blood not carrying qi.

Visceral dystrophy: generally manifested as pale complexion, pale nails and tears, dizziness, numbness of limbs, muscle spasm, palpitation, insomnia and dreaminess, dry skin, dry hair, dry stool and unfavorable urination.

Blood does not carry qi: Chinese medicine believes that blood is the mother of qi, and qi is attached by blood, and blood carries qi and moves. Blood deficiency is accompanied by qi deficiency, so patients not only have symptoms of blood deficiency, but also have symptoms of qi deficiency such as laziness, whispering, fatigue, shortness of breath and spontaneous sweating.