In general, the slightly red mucosa at the lesser curvature of the stomach in gastroscopy may be related to inflammation, tumor or diet. 1. Chronic gastritis: gastroscopy mucosal redness at the lesser curvature of the stomach is mostly caused by chronic gastritis, mostly due to bad dietary habits, so usually eat less indigestible, too greasy food, if the symptoms are serious, you can take oral medication, such as omeprazole, pantoprazole and so on. 2. Tumor: gastroscopy gastric curvature of the mucosa slightly red may also be due to gastric tumors, if it is a tumor, generally there will be gastric mucosal congestion, edema, local bulging, etc. If you suspect that gastric tumors, it is necessary to biopsy, relying on the pathological results to determine. 3. Diet-related: Eating stimulating food may also lead to this situation. In short, after the occurrence of this situation, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to carry out targeted treatment, please do not take medication on their own, so as not to delay the condition.