Insufficient production and excessive loss of blood can lead to blood deficiency.
If there are some more serious diseases, such as malignant tumors and pernicious anemia, the biochemical source of qi and blood is affected, and insufficient generation of qi and blood will lead to blood deficiency; or if there is insufficient congenital endowment (poor innate constitution and functioning), and there is not enough nutritional support in the later life, it will also lead to insufficient generation of blood, resulting in blood deficiency.
The presence of severe traumatic bleeding such as car accidents, maternal hemorrhage, and female menstrual disorders and leakage (excessive menstrual flow or dribbling) can lead to excessive loss of blood, which is difficult to be generated and supplied to the body within a short period of time, leading to blood deficiency.
If blood deficiency exists, it is important to seek timely medical treatment to avoid the adverse effects of blood deficiency that can jeopardize human health.