Painful Diarrhea Essential Formula is composed of Chen Pi, Atractylodes Macrocephala, Paeoniae Alba and Fenghuang. The efficacy of Essential Formula for Painful Diarrhea is as follows: Pericarpium Citri Reticulatae is used for drying dampness and harmonizing the stomach, regulating the qi and improving the weakness of the spleen and stomach. Rhizoma Atractylodis Macrocephalae replenishes the spleen and strengthens qi, which fundamentally reinforces the function of the spleen and stomach in eliminating food and transporting and digesting. Paeonia lactiflora, which softens the Liver and eases pain (relieving more urgent pain symptoms), prevents Liver Depression from overpowering the Spleen. Fenghuang is pungent to dissipate Liver Depression, fragrant to soothe Spleen Qi, and has the function of drying dampness to help stop diarrhea. This formula softens the Liver and replenishes the Spleen, dries dampness to stop diarrhea and pain, and is often used to treat abdominal pain and diarrhea caused by Liver Depression and Spleen Deficiency. This formula is contraindicated in people who are allergic to the medicines in this formula, people who have obvious heat toxicity, and people who have solid symptoms and damp-heat symptoms should be cautious in using this formula. During the use of this drug, pay attention to the diet of clear tonic mainly, avoid greasy. Adverse effects are not clear. Patients should seek professional Chinese medicine practitioners for treatment when they feel unwell, and should not use the medicine on their own.