why would I need an upper endoscopy?

why would I need an upper endoscopy?

by Shearly (SU)
Abdominal or chest pain, heartburn, nausea and vomiting, difficulty swallowing – these are just some of the symptoms that call for the expert diagnosis of a gastroenterologist. But if your doctor recommends an upper endoscopy, you may find yourself asking: what is it and why do I need it?