Your band might be to tight. Be careful for esophagitis, it is a common issue with band patients. My dr put me on nexium it was not working so he added Carafate (which is a liquid). I figured out by process of elimination, cinnamon was casuing my isse. I can't eat anything spicy. They recommend you open your band take nexium for a month then get it refilled.
Some days I can't even swallow water. Now that I figured out what causes it, I don't have to take the medicine daily.
keep a log of what you eat and see if it is a certain food.