The gastroscopy explores the stomach, it is necessary to do it when there are problems of abdominal pain, reflux problems or celiac disease, whenever the doctor requests this type of test.

It is most commonly used to diagnose stomach ulcers, reflux disease, celiac disease and sometimes the origin of gastrointestinal bleeding. Tumors of the esophagus and stomach can also be diagnosed.

To perform the gastroscopy, an endoscope is introduced through the patient's mouth, which consists of a tube with a camera at one end that allows the esophagus, stomach and duodenum to be seen with high resolution. Biopsies can also be taken.