Whether you can eat a hard-boiled egg the next day overnight depends on the environment in which it is stored, the degree of ripeness and deterioration, and cannot be generalized. If the eggs are fully cooked and have not deteriorated after refrigerating, they can be eaten overnight the next day. If they are cooked until half-cooked and have not been refrigerated, they should not be eaten the next day overnight.1. Storage environment: Generally, if boiled eggs are cooked and stored overnight at low temperature (usually the freezer temperature or winter low-temperature period), they generally do not deteriorate and can be eaten normally, with no change in taste, and can usually be stored for 48 hours. However, eggs stored at room temperature are generally recommended to be stored for only 6-8 hours, at which point the overnight period is too long, easy to breed bacteria, causing gastrointestinal discomfort, and is not recommended; 2. Degree of ripeness: eggs are fully cooked, the bacteria are killed, so they can be refrigerated overnight. However, if some people like to eat half-cooked eggs, the so-called “runny eggs”, which are not fully cooked, the bacteria in the yolk may not be completely killed, so it should not be eaten overnight, easy to bloating, diarrhea and other symptoms; 3, deterioration: fresh eggs need to be eaten, such as eggs that have deteriorated before steaming, or raw eggs Stored for a long time, whether cooked or not, whether refrigerated storage is not edible. Therefore, cooked eggs can be stored reasonably overnight for consumption the next day, but it is usually recommended that eggs are cooked and eaten now, to better retain the nutrients in the eggs.