Belching with GERD! - GERD causes an exess production of acid in the stomach plus the flap that leads to the stomach doesn't always close properly. There is medication to control the painful heartburn. * Some folks have other effects, for which medication does not help. That is gas. Gas that exits either end, with out warning, wherever you are. There are some places where it is NOT appreciated to drop a bomb...so it is not much fun.