Yam belongs to the category of medicine and food, with the effects of benefiting qi and nourishing yin (tonifying qi and yin), tonifying the spleen, lungs and kidneys, and fixing the essence to stop bandages. However, the effect of yam in soup is limited and generally falls short of the therapeutic effect. Yam, the main treatment of spleen deficiency, less food, tiredness (fatigue), loose stools (feces thin not shaped) diarrhea, lung deficiency, asthma and cough, kidney deficiency, spermatorrhea, bandage urinary frequency, internal heat and thirst (internal fever accompanied by more food and more drinking and more urination, and other symptoms) and so on. Yam should not be taken by those who are full of dampness (too much dampness leading to fullness and discomfort in the spleen and stomach) or those who have solid evils or stagnation. The effective dosage of yam in soup is limited and generally cannot achieve a therapeutic effect. If there is any discomfort after drinking yam soup, it is recommended to stop using it and seek medical advice promptly.