Yam is sweet, tonic but not greasy, fragrant but not dry, and has a good effect on treating diarrhea due to spleen deficiency. Yam is a soothing, nourishing and strengthening medicine, invigorating the spleen and stomach, widening the intestines, and has a good effect on chronic diarrhea with decreased gastrointestinal function. Yam can nourish yin and dampness, can lubricate and reduce astringency. It can treat loose stools because of its beneficial urination function, small convenience, draining water from the bladder, reducing the water in the intestines, and reducing the symptoms of loose stools. Yam can invigorate the spleen and benefit the stomach and widen the intestines, and can stop diarrhea. Because yam can calm the spleen and strengthen the power of nourishing qi and mobilizing the spleen, it can stop stool. "