The main function of Fu He San is to remove dampness, which is a pathological product of the weakness of the spleen and stomach that cannot digest the essence of water and grain. The usual irregular diet, or greed for cold drinks will damage the spleen and stomach, the spleen and stomach damage will have wet generation, wet long will not go into heat, and become damp heat. Poria, coix seeds and yam in Fu He San strengthen the spleen and dispel dampness to cure the root cause. Red beans, sand to warm the damp and move the qi, the intention is to get rid of dampness must move the qi; Amaranthus clears damp heat, dampness is draining; Pueraria Mirifica inspires the spleen, rising Yang to stop diarrhea; Gorgonzola astringent diarrhea, astringent spleen essence; spleen deficiency more indigestion, so the combination of chicken gold to help digestion, white lentils to strengthen the spleen to dispel dampness, both the symptoms and the root cause. Overall, Fu He San is the main dampness, and strengthen the spleen and stomach, dampness is easy to hurt Yin, so can not take Fu He San for a long time.