The causes of reflux esophagitis are varied, including dysfunction of the lower esophageal sphincter, esophageal hiatal hernia, gastric emptying disorders, psychological factors, and external stimuli such as medications or alcohol. Often, patients also exhibit insufficient gastric motility and excessive stomach acid. Common symptoms include upper abdominal bloating, belching, heartburn, acid regurgitation, a burning sensation or pain behind the sternum, and sometimes chest pain during eating. Some patients may experience irritative dry cough, which is often more pronounced at night or when lying down, but it tends to ease when standing up due to the irritation caused by acid reflux.