Normally, people have increased gastrointestinal motility in the afternoon, and if they have symptoms of indigestion or damage to the gastrointestinal mucosa, they tend to have more pronounced symptoms in the afternoon. If the stomach is uncomfortable and nauseous, it may be functional indigestion, but it cannot be completely excluded whether there are mucosal changes. If these symptoms occur frequently in the afternoon, you can exercise properly in the afternoon, rub your stomach to speed up bowel movements and exhaustion, and see if the stomach discomfort is relieved. If the symptoms of stomach discomfort and nausea are not relieved after exercise and habit changes, further appropriate tests should be considered.