Stomach feeling warm clinically known as heartburn may be caused by non-disease factors or related to pathological factors such as digestive system abnormalities and upper gastrointestinal tract tumors. 1. Non-disease factors: such as long-term consumption of spicy and stimulating foods, alcohol, smoking, etc. may produce damage to the esophageal mucosal barrier function, heartburn. 2. Pathological factors: digestive system abnormalities such as chronic gastritis, gastroesophageal reflux disease, peptic ulcer, etc. can cause abnormal gastrointestinal dynamics, abnormal secretion of gastric acid and reflux of gastric contents, which can lead to the symptoms of heartburn; tumors in the upper gastrointestinal tract, such as gastric cancer, can lead to mucosal damage and heartburn. If the burning heat in the stomach is not relieved or even aggravated for a long time, it is recommended to go to the hospital in time to find out the cause of the disease and treat the cause to avoid delaying the condition.