The sinuses are hollow spaces in the skull and the face bones around your nose. There are four pairs of sinuses, named for the bones that they're located in: The maxillary sinuses are located on each side of your nose, near the cheek bones. The frontal sinuses are located above the eyes, near your forehead.

How do you unblock a sinus cavity?

Breathing in steam

This may help relieve the symptoms of sinus congestion and encourage the sinuses to unblock. Running very hot water from a shower and breathing in the vapor may help unblock the sinuses and relieve symptoms. It is also possible to use a humidifier for the same purpose.

Does your sinus cavity go to your brain?

Once there, the infection can lead to swelling of the brain, seizures, altered mental state, and vomiting. So, yes, an sinus infection can (rarely) go to your brain, but here's the thing: It almost never comes out of nowhere, and it always causes symptoms—like an extremely severe headache.