Sinking feeling of the stomach may be caused by decreased peristalsis, excessive secretion of gastric acid, improper diet and other reasons. 1. Decrease in peristaltic function of the stomach: When the peristaltic emptying ability of the stomach is weakened or obstructed due to intestinal dysfunction or indigestion, food is retained in the stomach and the stomach is too full, which may lead to a sinking feeling in the stomach. 2. Excessive secretion of gastric acid: If you suffer from chronic gastritis, gastric ulcer and other common clinical digestive diseases, it may lead to excessive secretion of gastric acid, and when gastric acid is secreted excessively, it may cause the symptom of sinking stomach. 3. Improper diet: If you consume cold food for a long time and have an irregular diet, it may lead to chronic gastritis, which may lead to the symptoms of sinking stomach. It is recommended that people with a heavy stomach should adopt good dietary habits and go to the hospital in time to have the cause of the problem identified and treated.