There are more causes of abdominal distension and nausea, mainly the following: 1. Slow gastrointestinal motility caused by various reasons, such as functional dyspepsia, intestinal dysfunction, irritable bowel syndrome, can be caused. 2. Acute gastroenteritis caused by improper diet, inflammatory factors stimulate the mucosa and can lead to diarrhea, abdominal distension and nausea. 3. Digestive system-related organ diseases can also be induced The disease can be caused by peptic ulcer, gastroesophageal reflux disease, esophageal hiatus hernia, pancreatic failure syndrome, etc. 4.