Watermelon is not recommended for patients with acute gastroenteritis. Acute gastroenteritis may be an acute inflammation of the gastrointestinal mucosa caused by viruses, bacteria and other microbial infections, drugs, alcohol consumption and other causes. There may be abdominal pain, diarrhea, vomiting and other symptoms. Watermelon, as a fruit, is rich in glutamic acid, arginine, malic acid, vitamin C, glucose and other nutrients, which can accelerate gastrointestinal peristalsis while supplementing nutrition. Acute gastroenteritis patients taking watermelon may aggravate diarrhea and other symptoms, so it is not recommended to eat watermelon. Diet has no role in treating acute gastroenteritis, so you need to go to the hospital for further blood tests, stool routine and other items to find out the cause of the treatment under the guidance of the doctor.