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December 13, 2013 Posted by  Author   under   Health Care   This post is about  Sinus infection symptoms,  causes and home remedies to cure. Para nasal sinuses or sinuses in short are 4 pairs of mucus-lined hollow spaces inside bones of faces and skull, they are: Frontal Sinus                                                                                          Ethmoidal Sinus Sphenoidal Sinus Maxillary  Sinus Exact function of sinuses is unknown; but it is believed that sinuses filter the inhaled air, regulate pressure  within the nose,  contribute  to immune defense ,lighten the weight of skull, give resonance to voice ,absorb shock when blows to face and participate in faci...