Non-atrophic celiac gastritis may cause bad breath. Non-atrophic erosive gastritis, clinically known as chronic non-atrophic gastritis with erosion, is a disease in which lymphocyte and plasma cell infiltration in the gastric mucosa occurs under the effect of Helicobacter pylori infection, reflux, and other factors, and is accompanied by erosion and other changes. Patients with chronic non-atrophic gastritis usually have digestive and absorption dysfunction, and food stays in the gastrointestinal tract for a longer period of time, which decomposes under the action of intestinal flora and produces foul-smelling gases, leading to halitosis in patients. Chronic non-atrophic gastritis patients are usually accompanied by Helicobacter pylori infection, Helicobacter pylori in the stomach can decompose urea in the stomach, producing ammonia-containing gases, which usually have a foul odor, and may also cause the patient to have bad breath. Therefore, patients with chronic non-atrophic gastritis may develop bad breath, but bad breath is not a typical symptom of chronic non-atrophic gastritis. Patients with chronic non-atrophic gastritis mainly present with abdominal pain and bloating, loss of appetite, acid regurgitation and belching, nausea and vomiting. In addition, oral diseases such as dental caries, gingivitis, and periodontal disease can also trigger bad breath. When the patient has bad breath, it is recommended to consult a doctor in time to find out the cause of the disease, and actively accept the treatment, so as not to delay the condition.