" Your sinuses are the cavities that surround the nose. This includes cavities in your forehead, cheeks, and near your eyes. When your sinuses are healthy and functioning properly, mucus drains from the nose, helping to clear out any dirt, debris, or harmful bacteria. A sinus infection occurs when the mucus gets trapped in a sinus cavity, which allows bacteria to grow more easily. If you have a sinus infection, there are several ways you can ...
