Are your sinuses making you miserable? Even if only one sinus is infected, the pain can be surprisingly severe. Behind your nose or even in your temples, these little air pockets can flare up any time of year, but they’re especially vulnerable during cold and flu season.

Sinus pain affects 37 million people in the United States every year. You may have no idea what’s ailing your sinuses, and sometimes it can feel like there’s no cure in sight. But understanding how your sinuses work as well as various remedies can help you breathe easy again.