Whether or not overnight eggs can be eaten depends largely on whether or not they have deteriorated. Generally fully cooked eggs can continue to be eaten after low temperature storage. If stored at a high temperature, they may deteriorate after one night, so it is not recommended to continue eating them. Adequate cooking makes the nutrients in eggs easy to digest and absorb, and also kills bacteria. Cooked eggs contain fewer bacteria, and overnight, placed at low temperatures, there is a lower chance of bacteria reproduction leading to egg spoilage. Eggs that have not deteriorated overnight can continue to be eaten after heating. The presence of more bacteria in eggs that are not fully cooked can lead to the destruction of nutrients in eggs after a long period of time, which can lead to food poisoning, such as abdominal pain, diarrhea and nausea, and should be avoided. Bacterial reproduction is closely related to changes in external temperatures, and eggs left overnight in a hot summer environment are likely to have deteriorated and should be consumed with caution. Eggs that have deteriorated will generally have a pungent sour smell, a soft and sticky texture, and an abnormal yellow-green color, so before continuing to eat them, you should observe whether the smell, texture, and color of the eggs have changed abnormally, and if there is a possibility of deterioration, you should not continue to eat them.