Burping when hungry is related to factors such as diaphragm spasm and duodenal ulcers. When the body is hungry, the cerebral cortex sends out instructions to the gastric glands to secrete gastric acid, prompting the body to feel hungry. The stomach mechanically stirs and peristalsis, and since there is no food in the stomach, the stomach stirs and strains the diaphragmatic ligaments, even causing stimulation of the diaphragm, which can lead to hiccups when the diaphragm is in spasm. If there is inflammation or ulcers in the duodenum, the pain will occur due to the stimulation of stomach acid, which will lead to spasmodic contraction of the stomach wall and stimulation of the diaphragm, resulting in hiccups. It is important to have a regular diet and avoid excessive hunger. Long-term excessive hunger not only causes hiccups, but also increases the chances of suffering from gastritis and gastric ulcers.