Boiled water with yam has the effect of tonifying the spleen and nourishing the stomach, generating fluids and benefiting the lungs, and tonifying the kidneys and astringent essence. However, it is important to note that the effect of a single Chinese medicine is weak, and it can be used together with other medicines under the guidance of Chinese medicine practitioners to achieve the best therapeutic effect. Yam is sweet in flavor and flat in nature, and belongs to the spleen, lung and kidney meridians. If there is a deficiency of the spleen with little food, prolonged diarrhea, lung deficiency with asthma and cough, kidney deficiency with spermatorrhea, dysentery, frequent urination and other conditions, yam can be used to treat or improve. It should be noted that yam is forbidden to be taken by those who have dampness, fullness in the middle, or who have solid evils or stagnation. If you need to take yam, should be used under the guidance of a doctor’s diagnosis, do not use Chinese herbs without authorization, in order to prevent adverse effects on the body.