Gastroparesis is a disorder that occurs when the stomach takes too long to empty food. This disorder, also known as delayed gastric emptying, is a result of weak or abnormal muscles in the stomach. There’s no known cure for gastroparesis, but medical treatment can help you manage your symptoms. The exact cause of gastroparesis isn’t known, but it’s thought to have something to do with disrupted nerve signals in the stomach. It’s believed that the vagus nerve, which controls the movement of food through the digestive tract, becomes damaged and causes food to be digested slowly or not at all.