Gastritis patient’s mouth feels hot may be caused by bad dietary habits, bad life habits, bile reflux gastritis and other reasons. 1. Bad dietary habits: Gastritis patients eat high-fat, high-sugar, spicy and greasy food, drink coffee, carbonated drinks and other stimulating beverages, which cause stimulation of the oral mucosa, resulting in the mouth feeling hot. 2. Bad habits: Gastritis patients smoking and drinking alcohol and other bad habits, may lead to aggravation of the condition of gastritis, causing heartburn, gastric reflux, stimulation of the oral mucosa will feel hot mouth. 3. Bile reflux gastritis: gastritis patients with excessive secretion of gastric acid, resulting in bile reflux into the stomach caused by heartburn, acid reflux and other symptoms, gastric acid reflux into the oral cavity so that the patient feels hot mouth. If the mouth discomfort is serious, you should consult a doctor in time, under the guidance of a clear diagnosis, targeted treatment.