What causes fever, diarrhea and upper abdominal pain?

Fever that is, fever and diarrhea upper abdominal pain may be caused by mesenteric lymphadenitis, acute gastroenteritis, acute pancreatitis and so on.
1. mesenteric lymphadenitis: common in children, this disease is often caused by viral infections, and respiratory infections, intestinal infections, manifested as fever, abdominal pain, vomiting, accompanied by diarrhea, or constipation and other symptoms.
2. Acute gastroenteritis: it is an acute inflammation of the mucous membrane of the gastrointestinal tract caused by viral or bacterial infection, which may manifest as vomiting, nausea, abdominal pain, diarrhea, fever and other symptoms.
3. Acute pancreatitis: the main symptoms of acute pancreatitis are acute abdominal pain, fever, nausea, vomiting, diarrhea, etc. Patients with fever, diarrhea and epigastric pain may be due to an acute attack of pancreatitis.
The presence of fever, diarrhea, epigastric pain, should be timely consultation, diagnosis and treatment under the guidance of the doctor, so as not to miss the condition.