There is no such thing as which three people can’t eat yam. Generally speaking, it is forbidden for those who are allergic to yam, forbidden for those who are damp and full of dampness (too much dampness leading to fullness and discomfort in the spleen and stomach) or those who have solid evils or stagnation, and forbidden for those who are allergic to yam. Taken in moderation, yam has the effect of tonifying the spleen and qi and will not cause flatulence. Yam is both a traditional Chinese medicine and food, with the effect of tonifying the spleen, nourishing the stomach, generating fluids, benefiting the lungs, tonifying the kidney and astringing the essence, it is a common clinical tonic for qi, and is often used in the treatment of spleen deficiency with little food, fatigue and weakness, loose stools, diarrhea, coughing and wheezing in the lungs, spermatorrhea in the kidneys, dysuria, and internal heat and thirst (fever accompanied by excessive eating, drinking, and urination, and other symptoms). This product belongs to the tonic class of traditional Chinese medicine, so it should not be used by patients with dampness and fullness, or with solid evils or stagnation, so as not to aggravate the condition by retaining the evils. In addition, it should be noted that it is forbidden for those who are allergic to this product, and should be used with caution for those with allergies. Yam can be cooked and eaten with other foods, is a medicinal substance. Moderate intake of yam will not cause flatulence, but excessive intake may cause gastric distension and other uncomfortable symptoms. Yam is a commonly used Chinese medicine, if it is used as a medicine, it is recommended to use under the guidance of a doctor, do not blindly use your own medicine, so as not to cause adverse reactions.