Stephen did have some inflammation in his duodenum when he was diagnosed (but in other areas as well). His symptoms were as typical as they can be with crohns - d, fever, weight loss, etc. But, one of his very early symptoms, weeks before crohns was being considered was heartburn and the sensation that there was something 'blocking somewhere along the path' when he swallowed. It never seemed to be something that was extremely bothersome but, enough that he did mention it a couple of times.
As some of his other symptoms were beginning to present at this time, his GP has prescribed nexium (can't remember if it helped) and then, when his diagnosis followed a few weeks later, the nexium was continued because doing the EEN overnight with the tube gave him heartburn.
Since he's stopped using the NG tube, he's stopped taking nexium and hasn't had any issues.