Dysmotility means "things not moving well." Food travels from the esophagus into the stomach, which slowly releases it into the small intestine. There can be problems on any or all "floors" of this elevator. Things can get stuck between the esophagus and stomach, causing the classic GEFD symptoms of heartburn and acid reflux. In this case, the lower esophageal sphincter relaxes when it should be taut, allowing food to come back up. Or, food can get stuck between the stomach and small intestine, which causes symptoms of bloating, fullness, and so on. People with dysmotility will find that most diagnostic test will come back normal; the diagnostic tests available for G.I. disorders are generally for the purpose of ruling out an ulcer, tumor, or inflammation.

Dysmotility, with all its varying symptoms, is typically a chronic condition. Symptoms keep coming back, and by the time dysmotility is finally diagnosed, most people have had these symptoms for a long time. The only way you can stop symptoms from recurring is by changing your lifestyle habits or taking a motility drug as a maintenance therapy. The classic case of dysmotility goes something like this: You may notice that you suffer from chronic gas, bloating, and feeling full despite your efforts to control the symptoms. You may also have a lot of stress combined with poor eating habits. Your doctor prescribed an H2 receptor antagonist, but it didn't help. You were then sent for tests, which always come back normal. You were also counseled about changing your diet and lifestyle to avoid symptoms, but you are not very good at making dietary changes. Your sypmptoms persist, and you are miserable. Several months later, another doctor, perhaps a G.I. specialist, diagnoses a motility disorder, prescribes a specific motility drug or prokinetic agent, and your symptoms begin to disappear.

source:50 ways to relieve heartburn, reflux, and ulcers by M.Sara Rosenthal