“Yin deficiency” is a diagnosis we often come across in our clinical work, and patients with some basic knowledge of TCM often tell their doctors that they belong to the Yin deficiency constitution, but the basic meaning or actual manifestation of Yin deficiency may not be as simple as the patient describes. Yin deficiency” in this issue. First of all, literally, it involves “yin” and “deficiency” in the eight syndromes, meaning that yin and yang are yin and deficiency is deficiency, and the combination of the two is called yin deficiency. The basic manifestation of yin deficiency: “Yin deficiency is heat”, so heat is the basic manifestation of yin deficiency, but because its essence is deficiency, so this heat is also a kind of deficiency heat, roughly such common points: red cheek, thinning, five hearts troubled heat, hot flashes and night sweats, dry mouth and throat, red tongue, little moss and dry or vivid red without moss, is not with the teenage girl in front of a group of people Is it similar to the feeling of being confessed in front of a group of people when you were a teenager? What causes Yin deficiency? 1, stay up late for a long time 2, dietary preferences, more meat and less vegetarian, away from fruit 3, long-term ambulation, less exercise, less water 4, drinking alcohol Yin deficiency of the internal organs identification: in fact, Yin deficiency is only a generalization, in clinical work, need to further point out the specific location of the disease, that is, the identification of the internal organs, five organs, in addition to no spleen Yin deficiency, the other four will appear Yin deficiency, symptoms will also be in the basic symptoms of Yin deficiency, accompanied by the appearance of the internal organs The symptoms will be accompanied by the basic symptoms of Yin deficiency and the appearance of the internal organs. 1. Heart yin deficiency: palpitations, forgetfulness, insomnia, dreaminess 2. Lung yin deficiency: dry cough without phlegm, or little phlegm and sticky, or phlegm with blood, hoarseness 3. Liver yin deficiency: dry eyes, blurred vision, burning pain in the ribs, writhing in the hands and feet 4. Kidney yin deficiency: soreness and weakness of the waist and knees, seminal emission, menorrhagia or avalanche in women Common medicines and foods: salvia, maitake, asparagus, wolfberry, lily of the valley, dendrobium, etc.