According to my surgeon, once the wrap is fully healed, endoscopies can be done without a problem. Good luck Mr. T...try not to worry so much. Often something like a viral stomach illness can cause irritation and swelling of the wrap. Maybe you'll find out that it isn't anything permanent. I can't remember which of us here has experienced something similar, (Teala?) but hopefully they'll post soon. It took months to get back to normal after the illness.
Good luck in finding out what is happening...
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