Expired milk drink will have some harm to people, may appear abdominal pain, diarrhea and other symptoms, serious cases will cause acute gastroenteritis. Milk is a common drink, which contains a lot of protein, calcium and other nutrients, moderate drinking is good for the human body, can meet the body’s nutritional needs. But if the milk expired, not only the nutrients will be destroyed, but also may breed bacteria deterioration, drinking expired milk will stimulate the mucous membrane of the gastrointestinal tract, thus causing abdominal pain, diarrhea, nausea, vomiting and other symptoms, the symptoms of the more serious may also induce acute gastroenteritis, is not conducive to their own health. It is recommended to choose to drink milk within the shelf life of the milk, milk once expired, should be promptly classified in accordance with the waste disposal, to avoid reintroduction, otherwise not only can not provide nutrients for the body, but also may affect the health.