Eggs are rich in protein, and if they are bad, bacteria will invade and multiply inside the egg, and the shell will become gray or black, and mold can be seen on it. When the egg is opened, the yolk is scattered, cloudy, discolored, diluted, and even some hydrogen sulfide gas expands and overflows, causing the shell to break, and a very foul smell can be detected. These are toxic substances, and eating them can cause symptoms of poisoning, such as dizziness, nausea, acid reflux, vomiting, abdominal pain, diarrhea and other symptoms of food poisoning, and in serious cases, problems with organ function, which can be life-threatening. Therefore, try not to eat bad eggs.