Gastric ulcer is a sore or erosion that occurs in the stomach or upper duodenum, in this case as a peptic ulcer. This is a very common gastrointestinal ailment and whose size usually varies between 0.5 and 1.5 centimeters in diameter. The causes stomach ulcers are multiple, being intimately related to stress and health status of each patient. As for symptoms, gastric ulcer is characterized by an acute stomach pain, changes in bowel habits, nausea and vomiting. Your treatment begins mitigate their symptoms through gastric protectors and antacids and, in the case in question of a bleeding ulcer, it is necessary to stop the bleeding by endoscopy. Also, in the most serious cases it will be resorted to surgery, either by removing part of the stomach as intervening in the vagus nerve, responsible for monitoring the production of gastric acid in the body.