Yam should not be consumed while taking herbal medicines that contain Glycyrrhiza glabra. In addition, because yam is a tonic for the spleen and stomach, it should not be consumed if there is dietary stagnation, gastric distension, belching (burping), acid swallowing (swallowing acid from the stomach upward to the oropharynx), or disinterest in eating. Specific dietary contraindications should be based on the guidance of a medical professional. Yam belongs to the dual-purpose medicinal food, as a medicine with the spleen and stomach, the production of fluids and benefit the lungs, tonifying the kidney and astringent, etc., the main treatment for coughing and asthma, fatigue (fatigue), lumbar and knee soreness and weakness (lumbar and knee soreness and weakness of the sensation), urinary diarrhea, spermatorrhea and spermatogonial dyspepsia, and leukorrhea, women with excessive amounts of other diseases. It is also used as a supplement to replenish nutrients needed by the body. Chinese medicine should be taken under the guidance of a physician and in accordance with medical advice.