Kidney yang deficiency and spleen yang deficiency differ in terms of location, pathogenic mechanism and clinical manifestations. 1. Location: Kidney yang deficiency is mainly in the kidney; spleen yang deficiency is mainly in the spleen. 2. Pathogenesis: Kidney yang deficiency is mostly caused by yang deficiency in the body or damage to yang qi caused by aging kidney damage, prolonged illness or overwork; spleen yang deficiency is mostly caused by the aggravation of spleen qi deficiency, or improper diet, which damages spleen yang over a long period of time. 3. Clinical manifestations: Kidney-Yang deficiency manifests as soreness and coldness in the waist and knees, coldness in the lower limbs, frigidity in libido, nocturia, etc. Spleen-Yang deficiency manifests as abdominal distension, abdominal pain (persistent mild abdominal pain), a preference for warmth and pressure, a lack of desire for food and drink, and loose stools, etc. If you feel unwell, it is advisable to seek medical advice. If there is any discomfort, it is recommended to actively seek medical treatment and standardize the diagnosis and treatment under the accurate identification of professional physicians, so as to avoid delaying the condition.