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For signings, For Scientific American Science Quickly, I'm Kendra Pure Lewis, in for Rachel Feltman.

You've probably been in this situation.

You just had a big lunch or a tall carbonated drink.

And out of nowhere, a burp rises in your throat, unbidden.

It's so magnificent, you can taste it.

If you're someone's annoying brother, you've probably summoned a burp and unleashed it on your sibling's face at least once.

But Parasdama can't relate to any of that.

Because I can't burp, and for as long as I can remember, I could never burp.

It may sound silly, but it leads to all kinds of discomfort.

So my whole chest and stomach, it becomes heavy.

It feels like some air is stuck inside.

And it becomes so uncomfortable that one time I was driving on a highway, I had to stop my car,

get outside, try to vomit on the side of the road in order to get that air out.

I just can't sit or walk or do anything.

This inability to burp, he thought it was a personal failing, like how some people can't whistle.

But what he's experiencing is actually due to a medical condition that doctors have only

recently begun to understand. To learn more, we spoke to Robert Bastion, an otolaryngologist and expert in treating this

...