Kidney-Yang deficiency may affect the functions of the spleen and stomach. If kidney-Yang is impaired and cannot warm spleen-Yang, it will lead to a deficiency of spleen-Yang and kidney-Yang over time, resulting in a Spleen-Kidney-Yang deficiency (deficiency of Yang-Qi in the spleen and kidneys) syndrome. When kidney yang is weakened (deficiency of yang qi in the kidneys), it cannot warm spleen yang, and when warming is not done properly, deficiency cold will arise within the body, resulting in Spleen and Kidney Yang Deficiency (deficiency of yang qi in the spleen and kidneys). Clinical manifestations of Spleen and Kidney Yang Deficiency are prolonged diarrhea, prolonged dysentery, or diarrhea at five o’clock (diarrhea before dawn), lumbar and knee tenderness (a feeling of weakness and tenderness in the lumbar area and knees), coldness and pain in the lower abdomen, undigested grains (a large amount of undigested food in the stools), or swelling of the whole body, and urination, accompanied by coldness of the form (coldness of the body), coldness of the limbs, etc. If these symptoms occur, it is recommended to consult a doctor promptly. If the above symptoms occur, it is recommended to consult a doctor promptly.