Gastritis refers to the inflammatory lesions of the gastric mucosa caused by various etiologies. It is a common disease, which can be divided into two types: acute and chronic. There are two common kinds of acute gastritis: simple and corrosive. The former is manifested as upper abdominal discomfort, pain, anorexia and nausea, vomiting, while the latter is mainly characterized by upper gastrointestinal bleeding, hematemesis and...