The common causes of heartburn are: food factors, alkaline reflux gastritis, peptic ulcer and so on. 1. Food factors: for example, eating too acidic and spicy stimulating food, too cold food, and drinking a lot of alcohol, etc., will make the gastric acid secretion, and the gastric mucosa caused by the stimulation, resulting in a burning sensation in the stomach. 2. Alkaline reflux gastritis: It is a chronic inflammation caused by the reflux of bile and pancreatic juice into the stomach. The reflux can irritate the mucous membrane of the stomach, which in turn causes a burning sensation in the stomach. 3. Peptic ulcer: includes gastric ulcer and duodenal ulcer. During the attack of the disease, due to the irritation of the ulcer surface, resulting in increased secretion of gastric acid, in the process of digesting food, gastric acid will produce stimulation of the nerves of the stomach, which will lead to a burning, painful feeling in the stomach. If there is a burning sensation in the stomach, there may be many other reasons, it is recommended to consult a doctor in time and follow the doctor’s instructions for active treatment.