As a kind of pasta, bread has a certain shelf life. Once the shelf life has passed, it is easy to breed bacteria and microorganisms, and in severe cases it may be moldy. After eating, it may cause abdominal pain, diarrhea and other discomfort, posing a threat to human health. So, don't eat.
If you accidentally eat expired bread in your life, but your body has no obvious discomfort symptoms, then you don't need to worry too much at this time. It is recommended to drink plenty of water to accelerate its excretion.