Mucus usually starts out clear and may turn white, yellow, or even green after a couple of days. If you suspect your runny nose and other symptoms are caused by COVID-19, get tested—especially if ...

Sinus infections themselves aren’t contagious, but the viruses that cause most of them are. Viral sinus infections often follow colds or flu, which spread through respiratory droplets when someone ...

Learn more about hypertension. Researchers point to the likelihood that the blood vessels in your nose are more susceptible to damage and more likely to bleed over time. A 2019 study pointed to ...