Gastroesophageal reflux disease describes the passage of contents from the stomach into the esophagus. Between the esophagus and the stomach there is a circular muscle called the lower esophageal sphincter which opens when the bolus to pass into the stomach and then closes to prevent acid secretions and stomach contents pass upward into the esophagus. When this sphincter tone has diminished or is opened too many times, then reflux symptoms begin to appear, the most characteristic burning sensation or burning that rises to the throat.
The stomach is an important organ that may suffer from multiple diseases and some more mild, such as gastritis, ulcer and other more serious, cancer, bleeding ulcers or perforated which may put the patient’s life at risk. The area where is located the stomach, usually known as “mouth of the stomach” (medically known as epigastric) is an area in which often focus the most common abdominal symptoms acute or chronic pain related or not with the intake, nausea, heaviness, abdominal distension, etc. And in a large number of times these symptoms are not related to any organic alteration. But with an alteration in the functioning of the organs related to digestion, which is Called functional dyspepsia. If also knows as stomach upset.