Irritable Bowel Syndrome is diagnosed as diarrhea in Chinese medicine, which is classified into various types, among which spleen and stomach weakness can be treated with Strengthening the Spleen and Nourishing the Stomach Soup. Spleen and stomach soup consists of ginseng, atractylodes macrocephala, astragalus, angelica sinensis, white peony, tangerine peel, fennel, Chinese yam, poria, zedoary and other drugs. It has the effect of regulating the spleen and stomach, regulating qi and harmonizing the stomach. The original formula is mainly used in treating impotence and bone diseases. In this formula, Ginseng, Atractylodes Macrocephala, Poria, Chinese yam, and Chen Pi strengthen the spleen and benefit qi, Astragalus replenishes the middle qi, Angelica Sinensis nourishes the blood and invigorates the blood, Cumin warms the middle and disperses the cold (dispelling the cold evils by warming the spleen and the stomach) to relieve pain, and Ze Xie diarrhea induces drainage and seeps out the dampness (facilitating the operation of the water and fluid to dispel the dampness). This formula strengthens the spleen, invigorates qi, nourishes blood, warms the middle Jiao and disperses cold, and can also be used to treat diarrhea caused by coldness in the spleen and stomach (spleen and stomach being weak and cold). It should be noted that the adverse effects or contraindications of Strengthening the Spleen and Nourishing the Stomach Tang are still unclear, and it should be taken under the guidance of a professional Chinese medicine practitioner, do not use medicine without authorization, so as to avoid delaying the condition of the wrong medicine.