Farts are a natural part of the digestive process. If you feel one, it means your body has excess gas it needs to expel, and you should probably let it out. But what if it's socially impossible to let one fly? Hold it in, and the urge usually passes, but that's not necessarily a good thing for your bowels. Not farting farts can cause gas, bloating, and other uncomfortable symptoms, and if you do it too often, repressing gas can cause hemorrhoids or a distended bowel. The good news is, even if you hold in every single fart all day long, they'll all come out as soon as you fall asleep.