Expired beer should not be drunk, the substances in it may deteriorate, and it is easy to have abdominal pain, diarrhea and other discomforts after drinking it, affecting your health. Beer is a kind of alcoholic beverage with wheat malt and barley malt as the main ingredients. Normally, expired beer should not be drunk because it has exceeded the safe drinking period, and the wheat malt, barley malt, carbohydrates, proteins and other ingredients in it may have deteriorated and produced toxins. If you drink expired beer at this time, to a certain extent, it is easy to the gastrointestinal tract to cause different degrees of stimulation, patients are prone to abdominal pain, diarrhea, vomiting, nausea and other symptoms, may cause acute gastroenteritis and other diseases, and the taste is also worse, so you can not drink expired beer. In daily life, when found that the beer expired should avoid drinking, so as not to affect health. Therefore, you need to store beer properly. If you accidentally drink expired beer, you need to go to the hospital in time if you have the above symptoms.