1, yam powder is best before breakfast and after dinner, 15-30 grams of oral daily, 1-2 times oral.

2, yam is flat, sweet, into the spleen meridian, stomach meridian, kidney meridian, lung meridian. The function of yam is to tonify the spleen and nourish the stomach, produce fluids and benefit the lungs, and tonify the kidney and astringe the essence. It is used to tonify the spleen and nourish the stomach, for weak spleen and stomach, deficiency of the spleen with little food, prolonged diarrhea, and emaciation. It is also used in treating deficiency of lung yin, coughing, dry cough, low phlegm, sticky phlegm, and difficulty in coughing up phlegm. Nourishing the kidneys and astringent essence is used for spermatorrhea in kidney deficiency, dyspareunia, frequent urination, and enuresis in children.