Organic lesions such as gastritis and functional lesions such as slow gastrointestinal motility may present with symptoms of dyspepsia, which are characterized by bloating, burning sensation, abdominal pain, nausea, and vomiting. Some organic lesions, such as gastritis, duodenal ulcer, gastric cancer and other diseases, as well as functional dyspepsia such as slow gastrointestinal peristalsis and gastrointestinal sensory sensitivity may present with dyspeptic symptoms. Due to slow peristalsis of the gastrointestinal tract, food cannot be digested and absorbed in a timely manner after eating, gastric emptying is delayed, and food stays in the stomach for a long time, which may result in bloating. Due to gastritis and other gastric acid secretion increase, gastric acid stimulation of gastric mucosa, may appear burning sensation in the stomach. Due to gastritis and other inflammation stimulating the gastric mucosa, causing smooth muscle spasm, abdominal pain may occur. If the smooth muscle of the gastric mucosa contracts violently due to inflammation stimulation, and the gastric contents reflux, nausea and vomiting may occur. Dyspepsia may also be accompanied by other symptoms, should be under the guidance of a doctor to clarify the relevant symptoms, do not blindly self-judgment.