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 sinuses collectively are called the ...

Maxillary sinusitis or an infection of the maxillary sinus can have the following symptoms: fever, pain or pressure in face near the cheekbones, toothache, and runny nose. Sinusitis is the most common ...