Most stomach diseases are not infectious; Gastric disease caused by Helicobacter pylori is contagious. Gastropathy is a common disease in clinic, mainly including gastritis and gastric ulcer. These are chronic diseases. Gastritis is an inflammation of gastric mucosa caused by various reasons. It is also a disease of the digestive system and is not infectious. If you have stomach disease, you should go to the hospital for examination in time. If you are positive for Helicobacter pylori, you will be infected. Helicobacter pylori does not exist in the stomach of normal people, but it can be caused by mouth to mouth feeding, using public dishes and chopsticks, eating food and water infected with Helicobacter pylori. Therefore, when patients have indigestion, early satiety, abdominal distension, bad breath and other conditions, they should go to the hospital in time for breath test and gastric mucosa biopsy to determine whether they have been infected and give treatment according to the inspection results.