Yes. the LES will relax to release this excess pressure just as it does when there is excess gas. this is what a belch is. If there is acid near the LES it could escape. The more the LES has to relax to belch the more it can happen.
Ever have a burp and taste what you ate?
Moderator: GERD/Heartburn, Kidney disease
Nissen 6/06 and 5/09