Normally, eating bad food does not cause fever; however, if you eat severely spoiled or bacterially infected food, when inflammatory gastrointestinal infections occur, such as acute gastroenteritis, the patient will experience symptoms of fever. When eating bad food, the common discomfort symptoms are diarrhea, belly pain, nausea and so on. When the discomfort symptoms for a long time without relief, and gradually aggravated, it is recommended that patients go to the regular hospital for examination, to clarify the cause of the disease, the cause of treatment. In daily life, patients need to eat a reasonable diet, prohibit the consumption of contaminated and spoiled food. If the patient has diarrhea, vomiting, fever and other uncomfortable symptoms after eating, stop eating immediately, and it is recommended to go to the hospital in a timely manner, complete the relevant examinations, make a clear diagnosis, and choose the appropriate treatment under the guidance of the doctor.