Iron stick yam that is yam, can tonify the spleen, stomach and so on, there is no top ten efficacy of the statement, should follow the doctor’s prescription medication. The yam is a kind of sweet and flat medicine and food with the same origin, belonging to the spleen, lung, kidney meridian. It has the ability to nourish the spleen, nourish the stomach, promote the production of fluids and benefit the lungs, and nourish the kidney and astringent essence. It can be used for spleen deficiency with little food, prolonged diarrhea, lung deficiency with wheezing and coughing, kidney deficiency with spermatorrhea, dyspareunia, frequent urination, and deficiency of heat and thirst. Yam with Radix Codonopsis can enhance the effect of tonifying the spleen and benefiting the qi, nourishing yin and generating fluids; Yam with Gorgon fruit can enhance the effect of tonifying the spleen and benefiting the kidneys, astringency and diarrhea, and fixing spermatozoa and stopping the band. Yam is contraindicated in people with dampness (too much dampness leading to fullness and discomfort in the spleen and stomach), or with solid evils or stagnation. The adverse effects of yam are not clear, and it should be used under the guidance of a doctor for the treatment of diseases.