Yam can nourish the spleen and stomach is true, but there is no 3 types of people should not eat the statement, dampness in the fullness (dampness is too heavy to cause fullness of the spleen and stomach discomfort) or solid evil, stagnation of people prohibited from serving. Yam can nourish the spleen and stomach, produce fluid and benefit the lungs, tonify the kidney and astringent essence, and is suitable for the treatment of spleen deficiency with little food, lung deficiency with wheezing and coughing, kidney deficiency with spermatorrhea, deficiency heat and thirst, and prolonged diarrhea and other diseases. It can be used with ginseng, atractylodes macrocephala, and white lentils if it is used to treat weak spleen and stomach, loose stools (thin and unformed feces), and tiredness and fatigue; it is also used with radix et Rhizoma Ginseng, Ophiopogonis paniculata and Radix et Rhizoma Ginseng for treating prolonged coughing and wheezing in lung deficiency. The adverse effects of taking yam are not clear, and the use of yam should be under the guidance of traditional Chinese medicine practitioners before use.