Bad eggs cannot be eaten for the following reasons: 1. Bad eggs can harbor many disease-causing microorganisms, which can cause diarrhea, bloating, abdominal pain and health hazards if eaten with bad eggs rich in disease-causing microorganisms; 2. Many of the nutrients in eggs have been decomposed and consumed, so eating bad eggs does not play a role in supplementing nutrition; 3. Protein breakdown products increase the chance of allergies. If you eat bad eggs, it can cause skin allergies in mild cases and asthma in severe cases, which can be harmful to health.