Overnight eggs can be eaten if they are cooked, unbroken and well preserved, but not if they are undercooked, spoiled etc. If it is a raw egg, you can keep it at room temperature for about half a month, or put it in the refrigerator to extend its shelf life. If the surface of the shell of a raw egg is not broken or cracked, it can be eaten after overnight storage. If the shell of a raw egg has obvious cracks and breaks, it is easy to harbor bacteria and spoilage at this time, so you cannot continue to eat it after overnight. For cooked eggs, if the eggs are well cooked and properly preserved, you can continue to eat them overnight. If the eggs are not fully cooked, they should not be eaten overnight. Eggs that are not fully cooked may have more pathogenic bacteria such as salmonella, which multiply faster after overnight and may cause food poisoning after consumption. People who are allergic to eggs should not eat eggs.