Yam can help to improve the symptoms of gastric problems. Yam has the effect of nourishing the spleen and stomach, and can be used to treat symptoms such as poor appetite, loose stools, and other discomforts caused by deficiency of the spleen and stomach. However, when used as a food, it does not have the therapeutic effect of a medicine. When used as a traditional Chinese medicine, yam has the effects of nourishing the spleen and stomach, promoting the production of body fluid and lungs, and tonifying the kidneys and astringent essence. It can be used for poor appetite, diarrhea, cough with lung deficiency, spermatorrhea, dyspareunia, and frequent urination caused by weakness of the spleen and stomach. Adverse effects and contraindications are not clear, but it should be noted that it is forbidden to be taken by those who have dampness in the middle (too much dampness causing fullness and discomfort in the spleen and stomach) or those who have solid evils or accumulation of stagnation. When used as food does not have the therapeutic efficacy of drugs, and the therapeutic effect of a single Chinese medicine is limited, such as suffering from gastric diseases need to be timely hospital consultation, under the guidance of a professional physician to avoid delays in the condition.