Fried yam overnight if there is no deterioration can be eaten, if the deterioration can not be eaten, in order to be safe, it is recommended not to eat overnight dishes. If you eat spoiled overnight dishes, it is easier to cause gastrointestinal discomfort, and then cause the patient nausea, vomiting, diarrhea, and abdominal pain and other symptoms, if the condition is serious, and even lead to patients with food poisoning, endangering health. Therefore, if the yam is not eaten, it is recommended that the yam need to be sealed, and placed in the refrigerator to avoid air contact with the yam and lead to oxidation of the food black, but also cause bacterial growth. In addition, it should be reminded that any food left for a long time may lead to food spoilage, so it is recommended to try to eat fresh food.