I have the same thing. I went to the doctors, only to come up empty handed with no potential information as to what it might be. I got an X-Ray, and it did show up. However, they said it was a "normal anomaly", in what case I highly doubt. I've been doing frantic research, as I am worried sick about it, and I've come from possibilities of Gastritis, to even an ulcer. All of the possible causes I researched are linked to "possible upper abdominal discomfort" and therefore I believe it would take a lot of testing to figure out exactly what it is. Anyone who has this should seek a doctors help, and try to get as many tests done. Ex: X-rays/Blood tests/etc... Good luck to all who have this weird discomfort.