With the improvement of material life and the advent of the era of Chinese medicine, people pay more and more attention to their own health, today on the Internet casually browse, many people put forward “kidney deficiency” “heart deficiency” “Yin deficiency “”Yang deficiency” ……… The “deficiency” of each kind. The next line is like a mountain, while Chinese medicine is indeed more “profound” or “cumbersome” so that people’s perception is somewhat one-sided, the following I introduce the “deficiency”. What is the definition of deficiency disease? It refers to the deficiency of yin and yang, qi and blood, fluids and essence in the human body, while the evil is not significant, manifesting as deficiency, relaxation and decline characteristics of various symptoms. Deficiency symptoms are a small part of the “syllabus identification” in the “surface and interior, cold and heat, deficiency and reality, yin and yang”, and the clinical situation is generally deficient in those who have been ill for a long time and are slow, so it is difficult to use a few symptoms to summarize comprehensively. The basic principles of diagnosing diseases in TCM are: overall examination, diagnosis, and combination of disease and illness. The human body is a whole, and the deficiency disease is accumulated over time, so unlike the symptoms of simple symptoms, basically, as long as the deficiency disease, not only the internal organs of a “deficiency”, for example, the deficiency of young lesbians often manifested in the deficiency of both qi and yin, so that the performance of power, drowsiness, dreaminess, pale face, “no hands to tie the chicken”. “The deficiency of menopausal women is the deficiency of liver and kidney yin, or to the performance of menopause, as people say, insomnia, irritability, blurred vision, insomnia, irritability, or even mental depression or epilepsy. The deficiency in young adults is mostly heart-kidney deficiency or heart-kidney non-interaction, manifesting as insomnia, tinnitus, lumbar weakness, impotence, etc. The deficiency in old age is mostly spleen-kidney deficiency, manifesting as weakness, deafness, lumbar weakness, drowsiness or insomnia, etc. The above-mentioned are only simple symptoms and clinical manifestations, without the performance of tongue and pulse. It is also a rather superficial introduction. But the point is that comrades should not diagnose the disease for themselves. This will often lead you to the ditch.