That plugged, stuffy, underwater sensation in your ears when you have a cold, the flu, or a sinus infection is miserable. It can muffle hearing, cause popping or crackling, and even be painful. This feeling is medically known as Eustachian Tube Dysfunction (ETD) , and it’s an incredibly common side effect of upper respiratory infections.

The good news? In most cases, you can relieve this pressure safely at home. This guide explains why it happens and provides a step-by-step strategy to find relief, ranging from simple maneuvers to when you should absolutely see a doctor. To fix the problem, you first need to understand the anatomy.