Chronic rhinosinusitis is a persistent inflammatory condition that causes the sinuses to swell for more than three months.

You’ve felt it before—a persistent drip at the back of your throat that lingers like a guest who has overstayed their welcome. The constant tickle and sniffling is caused by mucus that drips down the ...

Paleobiologists have found that the sinuses of ocean dwelling relatives of modern-day crocodiles prevented them from evolving into deep divers like whales and dolphins.