Whether boiled eggs can be eaten overnight the next day depends on whether there are signs of deterioration. Fully boiled eggs can generally be stored at low temperature for 48 hours, and can generally be eaten if stored at low temperature until the next day. It is recommended that boiled eggs stored in the refrigerator be heated again before consumption, or that the boiled eggs be reboiled in a pot of water before eating. However, for semi-raw eggs, i.e. eggs with the yolk still flowing. This type of egg will be stored overnight and bacteria will grow, and the proteins in the egg will be decomposed, making it inedible the next day if it deteriorates. In addition, if eggs are not stored at low temperatures, they are prone to bacterial growth at higher temperatures and are also very susceptible to spoilage, which can lead to gastrointestinal discomfort such as diarrhea. When storing eggs, if you do not have a refrigerator, you can soak them in salt water because the concentration of salt in salt water is high and inhibits many bacteria. It should be noted that since eggs contain a large amount of cholesterol, it is not recommended to eat more than one. The Chinese Dietary Guidelines recommend that a normal person eat 40-50 grams (about one) of eggs a day.