Huaiyama is yam, sprouted yam if not accompanied by other changes, generally can be eaten, but there will be a certain loss of nutritional value, if accompanied by mold, cut and blackened inside and other changes, it can not be eaten. Yam contains carbohydrates, proteins, minerals and trace elements, vitamins, phytochemicals and other nutrients needed by the human body, and has high nutritional value. If the yam is sprouted and not accompanied by mold, it does not affect consumption, but the internal nutrient structure of the yam will change after sprouting, resulting in a decrease in the nutritional value of the yam. It is recommended to replace the yam with a new one if it is used as a raw material to nourish the body, but if it is consumed in daily life, it is generally not affected and the sprouted part can be removed completely. If the yam is sprouted and accompanied by mold, it is not recommended to eat, the yam sprouted and accompanied by mold means that the yam breeding mold, then if eaten may cause diarrhea, gastrointestinal disorders, food poisoning and other symptoms.