Acute gastroenteritis usually causes abdominal pain, diarrhea, vomiting and fever. If dehydration is severe, it will lead to electrolyte imbalance. You need to go to the hospital for infusion in time, take some anti-inflammatory drugs, and eat some light soft food at the same time to avoid irritating the gastrointestinal tract. Generally, it will be almost healed in two or three days. If the fever still persists on the third day and the diarrhea is not relieved, you need to go to the hospital for examination.