If the pain in the stomach occurs because of eating or drinking something unclean and is accompanied by fever, nausea and vomiting, it means that it is acute gastritis. At this time, you can go to the hospital to get some fluids or take some medicines orally. If you eat a lighter diet for a few days, you may gradually get better. If patients with chronic gastritis have recurring fever, it is best to go to the hospital to do some relevant tests, including routine blood tests and gastroscopy, to observe whether there are other bacteria in the stomach in addition to Helicobacter pylori infection. In addition to fever, chronic gastritis also causes weight loss and poor appetite. If this is the case, it is necessary to go to the hospital in time for examination and early treatment.