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6. Extra Sinus
Sinus is a cavity that is filled with air and located in the skull. The sinus cavities come in four pairs – the ethmoid sinus cavities, sphenoid sinus cavities, maxillary sinus cavities, and frontal sinus cavities.
According to experts, almost 10% of people around the world have extra sinus that narrows the transitional space of the nose. This increases the possibility of suffering from a sinus infection. In addition, those people with anatomical variation will end up having a narrower and even longer transitional space in their nose, which also puts them at risk of sinus infections.
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