It’s no surprise that sleeping and breathing are harder when you’re stuffed up from nasal allergies.
Picture your airway as a long, muscular tube running from your nose to your windpipe. If your allergies aren’t under control, the tissues of your upper throat swell and make the airway narrow. With less space for air, breathing gets harder.
If you have nasal allergies, talk to your doctor about how to get them under control. It may help to use a neti pot or a saline nasal spray before bed.