The difference between yin deficiency and yang deficiency is mainly the following manifestations: Yin deficiency refers to a series of pathological changes caused by insufficient fluid to moisten, nourish and restrain yang. The main symptoms are soreness and weakness of the limbs, dizziness and tinnitus, unsolid teeth or even looseness, hair loss, irritable heat in the five hearts, insomnia and dreaminess, scanty menstruation, night sweating, red face, thin body type, red tongue with little coating. The organs commonly affected by Yin deficiency are the lungs, heart, spleen, stomach, liver and kidneys. Yang deficiency refers to a series of manifestations of Yang deficiency and weakened or declining body functions, with the main symptoms being soreness and weakness of the waist and knees, cold hands over the elbows, cold feet over the knees, especially in the lower extremities; dizziness of the head and eyes, mental weakness, forgetfulness and poor sleep, white face or black skin color, pale fat tongue with white moss, sunken and weak pulse, or prolonged defecation of the bowels, often with incompletely digested food in the bowels, diarrhea in the fifth shift, swelling below the waist, and even pressing The puffiness is worse than below the waist, and the swelling of the abdomen is not elevated. Yang deficiency is common in the heart, kidney and spleen. The treatment of Yin deficiency and Yang deficiency is more complicated and specific treatment is needed to identify which organ is Yin deficiency or Yang deficiency. The above is the difference between yin deficiency and yang deficiency, treatment should be done after the clinician identifies the evidence and gives specific guidance program, at the same time, patients should pay attention to the usual living and eating habits, etc., in order to make the body achieve the balance of yin and yang.