Kidney Yang deficiency has an effect on bowel movements. Kidney yang deficiency has an effect on bowel movement mainly because the spleen is the foundation of the acquired nature, and the water and grain essence transported by the spleen and stomach can replenish the essence of the kidneys, while the kidneys are the foundation of the acquired nature, and the kidneys store the essence, and the kidney yang can warm the spleen yang and promote the transportation of the spleen and stomach. When kidney yang is insufficient, it is incapable of promoting the transportation of the spleen and stomach, and when the spleen is not healthy (the transportation function of the spleen is dysfunctional), incomplete digestion of food and prolonged diarrhea will occur. Kidney-Yang deficiency refers to the deficiency of Kidney-Yang and the loss of warmth in the organism, which is characterized by deficiency and coldness of the waist and knees, depression, loss of libido, long and clear urine, and loose stools. Changes in stools are just one of the clinical manifestations of kidney yang deficiency. There are many reasons for changes in stools, not only Kidney-Yang deficiency. When there are changes in the stool, you should go to the hospital in time, under the guidance of the doctor to treat, not blindly self-medication.