Acute gastroenteritis is primarily characterized by symptoms such as abdominal pain, diarrhea, and vomiting, and sometimes accompanied by fever. It is mainly caused by exposure to cold or unhygienic food consumption. Gastroenteritis caused by exposure to cold, also known as a "stomach cold," generally follows a natural course of about a week and can be fully cured with symptomatic treatment. Infectious diarrhea caused by bacterial infections should be comprehensively assessed based on specific symptoms and the severity of the disease. For general cases of enteritis, recovery can usually occur within a day or two, or two to three days after administering antibiotics orally or intravenously. Bacterial dysentery, however, typically presents with more severe symptoms and requires a longer treatment period, generally needing at least a week or even longer. (The use of medications should be under the guidance of a professional doctor.)