Acute gastroenteritis

The stomach is the main digestive organ of the human body. Acute gastritis is a common disease, mainly manifested as upper abdominal pain and discomfort, loss of appetite, nausea and vomiting, sometimes accompanied by diarrhea. Severe acute gastritis may also cause hematemesis and melena. Acute gastritis includes four types, of which acute simple gastritis is the most commonly encountered in daily life. Acute gastroenteritis is mainly manifested as nausea, vomiting, abdominal pain, diarrhea, and fever; severe cases may lead to dehydration, electrolyte imbalance, and shock. Patients typically present with nausea and vomiting first, followed by diarrhea, 3 to 5 times daily or even up to dozens of times, with stools mostly watery, dark yellow or greenish, and foul-smelling, possibly accompanied by abdominal colic, fever, and generalized body aches.