Contraindications of yam beans mainly include colds, stomach and intestinal stagnation is contraindicated, solid evil, stagnation should not be eaten, yam beans as a kind of medicine and food food, can not replace the medication, if you are not feeling well, it is recommended to ask a physician for treatment. Yam bean is also known as yam seed, zero Yu Zi, generally refers to the yam plant leaf axil below the growth of the bead shoots. According to Chinese medicine, yam beans are flat, sweet, to the lungs, spleen, kidney meridian, with the spleen, tonic deficiency, tonifying the lungs and qi and other effects, can be used for eating less swelling, lung deficiency cough, kidney deficiency urinary frequency and other diseases. The way to eat yam beans have internal medicine, boiled and peeled to eat. Eating yam beans also have certain contraindications, such as yam beans have astringent effect, so colds, gastrointestinal stagnation should be avoided. And also has the effect of nourishing yin to help dampness, so solid evil, stagnant people should not eat. Chinese medicine needs to be used by a Chinese medicine practitioner to identify and guide the use, not self-medication, so as not to cause adverse consequences.