<unk>  is a spontaneous, asymptomatic collapse of an air<unk>  (usually the maxillary<unk>  and orbital floor) associated with negative<unk>  pressures. It can cause painless facial asymmetry, diplopia and enophthalmos. Diagnosis is suspected based on symptoms, and can be confirmed using a CT scan. Treatment is surgical involving making an outlet for mucous drainage from the obstructed<unk> , and, in some cases, paired with reconstruction of the orbital floor. It is slightly more common in middle age.
Silent sinus syndrome
Hypnic headache
Hypertensive emergency
Nasodigitoacoustic syndrome
Foreign accent syndrome
Intracranial hypertension syndrome
Heat syncope
Red wine headache