Have you ever noticed that flying makes you a little gassy? Don’t worry, that’s not just you. This is a real, scientifically described phenomenon - hafe or high altitude flatus expulsion is the term the researchers use for the increasing urge to fart as you climb in altitude.
Isn’t it great that it happens in an airplane, which is just a closed tube with a lot of people in it? It’s explained by Boyle’s Law, one of the fundamental principles of gases which states that the product of a gas’s pressure and volume remains constant. As your altitude increases, there is less atmospheric pressure acting on the gases inside your body - yes, all of them - which means that the volume of the gases increases and you either have to let them out or endure the pain of holding them in for the entire flight. So, don’t do that!
Next time you take to the skies, just know that you are not the only one feeling the pressure.