Gastritis represents a nonspecific inflammation of the stomach. Clinically, the three most common and important causes of gastritis are infection of nonsteroidal anti- inflammatory drugs(NSAIDs), and stress related mucosal changes (5p334)• Gastritis represents a nonspecific inflammation of the stomach.Clinically,the three most common and important causes of gastritis are infection of nonsteroidal anti￾inflammatory drugs(NSAIDs),and stress￾related mucosal changes. (5p334)