There is no authoritative information on the dangers of eating leftovers. If you eat leftovers for a long time, malnutrition, acute gastroenteritis, chronic gastritis and other diseases may occur. Leftovers are food that is left over, and there is no authoritative information on the dangers of eating leftovers. However, according to other relevant information, as the nutrient content of leftover food has significantly decreased, if you eat leftover food for a long time, you cannot replenish enough nutrients for your body, and it is easier to cause malnutrition. Secondly, if you accidentally eat spoiled leftovers, you are prone to abdominal pain, diarrhea, nausea, vomiting and other digestive discomforts, inducing gastrointestinal diseases, which are clinically common in acute gastroenteritis, chronic gastritis and so on. Therefore, it is not recommended to eat leftovers usually, so as not to adversely affect your health. In summary, you need to eat fresh food in your daily life to ensure a balanced intake of various nutrients. If you feel sick after eating leftover food, you should go to the hospital in time.