Standing for a long time the stomach has a kind of falling feeling to consider may be caused by eating too much, in addition can not be ruled out is indigestion, gastritis and other diseases and caused. 1. Eating too much: If you usually overeat or eat too much food at one time, it is easy to cause a sense of satiety, so it can happen to stand for a long time the stomach has a kind of falling feeling, usually in the change of dietary structure, to develop the habit of eating less and more frequent meals, this phenomenon can be gradually relieved. 2. Indigestion: its causes include decreased diastolic function of gastric contents, genetic factors, infectious factors, mental and psychological factors, etc. Typical symptoms are postprandial fullness, early satiety, accompanied by acid reflux, heartburn, stomach drop feeling, so it can cause a kind of stomach drop feeling after standing for a long time. 3. Gastritis: its causes include stress, drug factors, trauma and physical factors and Helicobacter pylori infection, clinical symptoms are mainly epigastric pain, bloating, nausea, belching, if you stand for a long time, due to inflammation stimulation, but also feel the stomach has a kind of falling feeling. If the feeling of stomach drop recurs after standing for a long time, it is recommended to go to the hospital for a detailed examination to make a clear diagnosis.