Yam is a traditional Chinese medicine with the effects of tonifying qi and nourishing yin, fixing essence and stopping bandages, but not with the effects of stopping itching. Yam is the rhizome of the plant Dioscorea spp. of the family Dioscoreaceae, also known as Dioscorea, yam, yuyan, etc. It has a sweet flavor, flat nature, and belongs to the lung, spleen and kidney meridians. It is sweet in taste and flat in nature, and belongs to the lung, spleen and kidney meridians. It has the effects of tonifying qi and nourishing yin, tonifying the spleen, lung and kidney, and fixing semen and stopping the belt. This drug is mainly used to treat spermatorrhea, diaphoresis and frequent urination caused by kidney deficiency; loss of appetite, fatigue and diarrhea caused by spleen deficiency; and cough and asthma caused by lung deficiency. It should be noted that this drug should not be used in combination with Gansui, and its efficacy will be reduced when combined with cuttlebone, corrugated seed, dragon bone and oyster. If you have any related symptoms, please go to the regular hospital in a timely manner under the guidance of a professional physician to use the drug, so as not to delay the condition.