I have a problem with reflux, and a sensation of a blockage in my throat, but everything looks fine when I have a gastroscopy. Might I anyway have a Hiatus hernia?

Yes, you might. It is difficult to diagnose a Hiatus hernia through gastroscopy. Because the problem can come and go, you can’t be certain that a possible hernia will be discovered the day the gastroscopy is performed. Research shows that it is just as important to listen to the patient’s description of the symptoms to be able to make the correct diagnosis and begin treatment.