Both Easy San and Flat Stomach San belong to traditional Chinese medicine prescription, the difference between the two is mainly reflected in the composition of the formula, function and main treatment, contraindication to the use of three major aspects. 1. Formulation composition: Free San is composed of licorice, angelica, poria, white peony, atractylodes, chaihu and other traditional Chinese medicines. The formula is composed of Cangzhu, Houpu, Chenpi and licorice. 2. Efficacy and Indications: With the efficacy of dispersing the liver and relieving depression, nourishing blood and strengthening the spleen, Easy San is mainly used for treating liver depression, blood deficiency and spleen weakness, which is characterized by dystocia (pain in the area of coarseness and ribs), headache, blurred vision, dry mouth, fatigue, and low food intake, and is also used in patients with irregular menstruation and breast distension and pain. Flat Stomach San has the effect of drying dampness, strengthening the spleen, moving qi and harmonizing the stomach, and is mainly used for treating dampness stagnation in the spleen and stomach (stagnation of dampness in the spleen and stomach), as evidenced by abdominal distension, inappetence, nausea, vomiting, belching (burping), heaviness of limbs, and so on. 3. Contraindications: Easy San should be used with caution in cases of yin deficiency and hyperactivity of yang; it is not suitable for those with insufficient yin and fluid, weak spleen and stomach, as well as pregnant women to use Pinggong San. Therefore, if you need to take Free San and Ping Stomach San, you should choose the appropriate medicine for your condition after the diagnosis by a Chinese medicine practitioner, and should not take the medicine on your own.