An upper GI endoscopy usually takes about 10 minutes.
If appropriate, the endoscopist may offer you a sedative to help you to relax.
The endoscopist will place a flexible telescope (endoscope) into the back of your throat and down into your stomach. From here the endoscope will pass into your duodenum.
The endoscopist will be able to look for problems such as inflammation or ulcers. They will be able to perform biopsies and take photographs to help make the diagnosis.