Kidney Essence (Jing) Deficiency is a medical condition that is caused by a lack of Kidney Yin and, to some extent, Kidney Yang. This deficiency affects growth, development, reproduction, sexuality, bones, marrow, the brain, teeth, memory, and hair.
In children, this deficiency can be caused by poor hereditary constitution, aging, excessive sexual activity, or a prolonged deficiency of Kidney Yin or Yang. The symptoms in children include poor bone development and late closure of the fontanelle, while in adults it can cause softening of bones and weakness in the legs and knees.
The Kidney Essence also nourishes the brain and provides it with marrow, which can result in developmental issues in children and decreased mental sharpness and memory problems in adults. This deficiency can also lead to hair loss and premature graying of hair.
Finally, the Kidney Essence plays a critical role in sexual function, so a deficiency in this area can cause sexual problems and infertility in both men and women.
There are several factors that can contribute to Kidney Essence Deficiency, including poor hereditary constitution, excessive sexual activity, prolonged loss of blood, and childbirth. Additionally, Kidney Essence Deficiency can stem from other medical conditions such as Kidney Yang Deficiency, Liver Blood Deficiency, and Kidney Yin Deficiency.