Regarding whether gastritis can be contagious, it requires specific analysis of the circumstances. If the gastritis is caused by an infection of Helicobacter pylori, then it can be transmitted to others through shared meals or fecal-oral transmission. Under such circumstances, if others do not maintain clean eating habits or overeat, they are at a higher risk of developing chronic gastritis. If the occurrence of gastritis is not due to an infection from Helicobacter pylori, then it will not be contagious to others. Patients with gastritis should be cautious with their diet, avoiding spicy and irritating foods, and should not overeat. It’s important to eat regularly and in moderate amounts, and maintain a bland diet.