Gastroparesis, or paralysis of the stomach, refers to a stomach that empties slowly. Gastroparesis is characterized by symptoms by bloating, nausea, vomiting and feeling full after eating only a small amount of food. Some patients can be quite sick with nausea, retching, vomiting and weight loss requiring ER visits and hospitalizations. Gastroparesis can occur as a result of several conditions, especially in people with diabetes. However, the cause of gastroparesis is not known in many patients. It is more common in women than men.