Boiled eggs can generally be eaten overnight if they are not spoiled. However, if the eggs are spoiled, it is generally not recommended to eat them, so as not to cause harm to the body. Eggs belong to the food rich in high quality protein, in which every 100g of eggs, containing protein 13.3g, cholesterol 585mg, fat 8.9g, calcium 56mg, phosphorus 130mg. daily eating eggs can supplement the body’s protein needs, help to enhance the physical fitness, is conducive to good health. Usually, overnight eggs can be eaten if the boiled eggs are well preserved and not spoiled. However, if the storage is not good, it may lead to deterioration of the egg components. Eating overnight eggs at this time may irritate the mucosa of the gastrointestinal tract and cause gastrointestinal symptoms such as abdominal pain, diarrhea, nausea, vomiting and other gastrointestinal discomforts, which affects the body’s health. If the patient accidentally ate spoiled overnight eggs, causing abnormal physical discomfort, should be promptly consulted.