Due to the lack of healthy qi in human body, it is impossible to resist evil spirits from going out, so that evil spirits sink into bone marrow and damage kidney essence. Traditional Chinese medicine believes that essence and blood are homologous, and deficiency of kidney essence cannot be converted into qi and blood, which will lead to deficiency of qi and blood and show anemia. If the patient has deficiency of kidney yin and hyperactivity of fire due to yin deficiency, it may show a series of manifestations such as bleeding and low fever.

It can be used for treating syringomyelia and other spinal cord diseases, such as backache and leg weakness, muscle weakness and pain, cold and heat sensation, dizziness and tinnitus.

Deficiency of kidney essence is the origin of human body. Huangdi Neijing said: "People are born with essence first, and essence leads to brain (spinal cord) birth." Deficiency of kidney essence can not produce marrow, which can lead to kidney deficiency and empty marrow. This disease is mostly caused by congenital malformation, and the deficiency of kidney essence is the main cause. Latent onset, spleen and kidney are damaged, qi and blood are surly, essence is damaged, and the condition is aggravated.