my mom is 90years old she is constantly burps for about 2hours none stop even after just drinking a little bit of water and wakes uu through the night choking then again burps for 2hours none stop but now i press under her stomac for a few seconds and it stops but keeps starting no matter what she eats or drinks she d,ont drink or eat anything acid but by then she hardly coud eat much i had to get her insure and the little bit she eats i boil .consulted doc say extrays are normal some more test to go through but they are not shure what it could do . please help thank you