Flying feels routine—grab your boarding pass, buckle up, and relax. But emergency room doctors say what you do during those hours in the air can quietly affect your health in ways most travelers don’t realize. The combination of low cabin humidity, reduced oxygen levels, and long periods of sitting creates a perfect storm for preventable medical issues. In fact, even healthy passengers can experience dehydration, circulation problems, or worsening symptoms of existing conditions mid-flight. If you’ve ever stepped off a plane feeling dizzy, swollen, or unusually exhausted, there’s a reason. Here are two common in-flight mistakes doctors warn about—and how to avoid them.
