condition analysis: kidney yang deficiency, that is, kidney yang deficiency, is a symptom of kidney yang failure. It is mostly caused by factors such as deficiency of yang in the body, kidney deficiency in the elderly, kidney injury caused by long-term illness, and overwork in the house. The clinical manifestations are pain in the waist and knees, chills in the limbs, especially in the lower limbs, dizziness in the head, listlessness and white face; Or blackish, pale tongue with fat and white fur, and weak pulse; Or impotence, premature ejaculation, women's infertility due to palace cold, or prolonged defecation, indigestion and diarrhea at night; Or edema, especially below the waist, can not afford to sag, or even abdominal pain, palpitations, cough and asthma. Modern medicine believes that kidney-yang deficiency is related to neuroendocrine immune system (NEIS). Suggestions: People with yang deficiency should eat warm food, food with the function of warming yang and dispelling cold, food with high calorie and rich nutrition. Avoid eating cold things, all kinds of cold drinks and fruits. Foods with warm nature and the function of tonifying kidney yang and warming spleen yang, such as indica rice, dog meat, mutton, chicken, pork belly, etc.