Feeling hot in the stomach can be caused by dietary factors, upper gastrointestinal ulcers and bile reflux gastritis. 1. Dietary factors: when consuming a lot of spicy and stimulating food, it may stimulate the stomach to secrete too much gastric acid, which will lead to the situation of always feeling hot in the stomach. 2. Upper gastrointestinal ulcer: If the patient has upper gastrointestinal ulcer disease, such as gastric ulcer, duodenal ulcer, etc., after eating, when the secreted gastric acid comes into contact with the wounds of the ulcer, then the patient will always feel hot in the stomach. 3. Bile reflux gastritis: usually due to the patient’s high intestinal pressure, when the contents of the duodenum reflux into the stomach, it will stimulate the gastric mucosa, which will always feel hot in the stomach. Therefore, if the patient’s stomach appears obvious fever or other uncomfortable symptoms, should go to the hospital in time to consult the doctor, to clarify the cause of the disease, for treatment.