Our expert says:
Barretts esophagitis is caused by acid that pushes up in the esophagus from the stomach due to the valve between the stomach and esophagus not closing properly. This usually causes burning of the lower part of the esophagus and the cells in the bottom part of the esophagus can then become abnormal, and eventually cause cancer. The acid pushes up because you have a hiatus hernia or a weak valve.
Treatment is antiacid medication like Nexiam longterm, or if he has a big hiatus hernia, they may consider operation to fix it.
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