Child is air swallowing and burping

[Parasaurolophus]

Five-year-old DS has recently started gulping air and then burping A LOT. He doesn't seem to be doing this on purpose and gets really upset when we talk to him about it. I don't think he can stop it. Right now he is playing on the ipad and swallowing and burping about 3x a minute.

Has anyone had any experience with this? The google search was upsetting.

DS (6) does this and it drives me insane!

He discovered ages ago that he can make himself burp at will and loved to demonstrate this 'talent'. When I hear him burping I tell him not to do it and sometimes he'll say sorry so I know he's been doing it deliberately, but other times he claimes that he can't help it and can't stop

Sorry I don't have any wise words or help to offer, but you're not alone in having a burping child