Yin essence deficiency refers to the lack of human essence, the most basic substance that constitutes and maintains the life activities of the human body decreases, and the symptoms of physiological function decline. In the broad sense, essence is all the substances that can sustain the life phenomena and physiological functions of the human body, including essence, blood, fluid and liquid. In a narrower sense, essence refers to the subtle substances in the kidneys that have reproductive functions and reproduce life. Compared to qi, essence belongs to yin, so it is called yin essence. Yin essence has a nourishing effect on the human body, and yin essence deficiency mostly refers to a deficiency of kidney yin essence. Kidney yin essence deficiency can be characterized by growth retardation, slow thinking, memory loss, dizziness, bone weakness, mobility, mental retardation, and reduced function of internal organs. If you have symptoms related to yin and essence deficiency, please consult a doctor in time, do not take medication without authorization, you can take six flavors of dihuang pill, Zuo Gui Pill, tortoise, deer, two immortal cream and other medicines under the guidance of a professional physician’s diagnosis.