Why does spleen deficiency cause diarrhea after lunch?

Spleen deficiency is a common condition. Patients with spleen deficiency often experience abnormal bowel movements, excessive dampness, gynecological inflammation, and a thick, white tongue coating. Spleen deficiency can be further categorized into spleen-yang deficiency, spleen-yin deficiency, and spleen-stomach qi deficiency—each presenting with distinct symptoms. So why do individuals with spleen deficiency experience diarrhea after lunch?

Why Does Spleen Deficiency Cause Diarrhea After Lunch?

Diarrhea occurring after lunch in individuals with spleen deficiency results from impaired functions of the spleen—specifically its roles in “raising the clear” (ascending clear qi) and “transformation and transportation.” In Traditional Chinese Medicine (TCM), the spleen resides in the middle jiao and serves as the primary organ responsible for transforming and transporting nutrients—including refined essences derived from food and fluids. After eating, the stomach and spleen begin their digestive work: partially digested food and fluids pass from the stomach into the small intestine. The absorption of these refined fluid essences depends critically on the spleen’s ability to raise the clear and separate it from the turbid. When spleen qi is weak, this ascending-clear function becomes deficient; consequently, the essential nutrients from food and fluids fail to be properly transformed and transported, while the unrefined, turbid components descend instead—leading to diarrhea.

Pay attention to keeping warm—this is crucial. Many health issues arise from inadequate warmth preservation. Individuals with weakened spleen and stomach function should especially guard against cold exposure to prevent cold hands and feet. For those experiencing diarrhea, applying effective warmth to the umbilical area is particularly beneficial. Additionally, maintaining a cheerful mood is important: positive emotions enhance appetite and support healthy digestion—thus contributing significantly to spleen-stomach regulation.

In daily life, maintain regular, balanced eating habits. Avoid spicy, stimulating foods, overeating, or irregular meals, and refrain from staying up late. We hope this explanation proves helpful to you.