<unk>  most often affects the maxillary<unk> , usually with a collapse of the orbital floor. It may also affect the frontal<unk>  or the ethmoid<unk> . When the maxillary<unk>  is involved, the inferior oblique muscle may be damaged. The cause of<unk>  is not well understood. Bacteria in the maxillary<unk>  may be involved. The connection to the nose may be blocked. This can create negative pressure in the<unk> , as secretions are reabsorbed.
Silent sinus syndrome
Hypnic headache
Hypertensive emergency
Nasodigitoacoustic syndrome
Foreign accent syndrome
Intracranial hypertension syndrome
Heat syncope
Red wine headache