Feeling gassy at 30,000 feet? You’re not flying solo.

Whether you’re headed to paradise or jetting off for business, many passengers find themselves battling a different kind of turbulence when their guts revolt midair — leaving them bloated , cramping and desperate for solid ground.

To get to the bottom of this phenomenon known as “jet belly,” The Post spoke to Dr. Brennan Spiegel , a UCLA professor and director of Health Services Research at Cedars-Sinai, who also broke down how to prevent it from wrecking your next flight. 3

What is jet belly — and why does it happen?

It’s a nickname for the bloating and cramping many people get on airplanes.

At sea level, Spiegel explained, gravity pulls air molecules tight to Earth, keeping the atmosphere dense. But as you climb higher,

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