We are more familiar with kidney deficiency and know that kidney deficiency is only a term used in Chinese medicine and does not exist in Western medicine. Kidney deficiency in TCM is not the name of an independent disease, but a group of symptoms. Kidney Yang deficiency and Kidney Yin deficiency are two different symptoms that are common in Chinese medicine to identify kidney deficiency, and the selection of medicine is also different. Therefore, we must first distinguish which symptom of kidney deficiency we are talking about when we use medicine for kidney deficiency. It is not difficult to distinguish between kidney yin deficiency and kidney yang deficiency, but you need to be more attentive, and you can distinguish them from different symptoms: 1, the mental state is different, kidney yin deficiency is accompanied by mental restlessness, irritability, irritability, easy to fire and other symptoms; kidney yang deficiency is accompanied by fatigue, mental weakness, easy to fatigue, short of breath, lazy, depression and other symptoms. 2, the performance of pain is different, most of the kidney Yin deficiency for the waist and knee soreness, weakness of the legs and other symptoms; kidney Yang deficiency in most cases will appear waist and leg pain or waist and knee cold pain and other symptoms. Kidney Yin deficiency is characterized by fear of heat, irritability of the heart, dry mouth and tongue; Kidney Yang deficiency is characterized by fear of cold and cold hands and feet. 4, sleep state is different, kidney yin deficiency is easy to insomnia and dreamy, dreaming and grinding teeth; kidney yang deficiency is easy to sleepy, drowsy, dreamy. 5, the urine situation is different, kidney yin deficiency urine is more yellow or short red, urine less, etc.; kidney yang deficiency urine clear long, night urination, and more frequent, urgent, incomplete urination and other symptoms. 6, the stool situation is also different, kidney Yin deficiency stool is dry, more yellow; kidney Yang deficiency stool is loose, easy to diarrhea. 7, the tongue is different, kidney yin deficiency tongue is red, less fluid, less tongue coating, thinner or no tongue coating; kidney yang deficiency tongue is lighter, the tongue coating is whiter, thicker. 8, the face color is different, kidney yin deficiency face color more vivid red; kidney yang deficiency face color? White or sallow, or blue and white without light. 9, sweating state is different, kidney yin deficiency hands and feet sweating, mostly night sweating, sweating when sleeping, wake up from the stop; kidney yang deficiency is mostly self-sweating, easy sweating or sweating more, this sweating is often not due to exertion, not due to hot weather and over-warm clothes and sweating. Kidney Yin deficiency has a thin body with symptoms such as dry mouth and dry tongue and lack of fluids; Kidney Yang deficiency has a fat or swollen body with symptoms such as water and dampness stopping inside and unfavorable urination. Although there are so many differences between kidney yang deficiency and kidney yin deficiency, they have something in common, and it is rare for a single kidney deficiency to occur, but it usually occurs concurrently.