| http://www.w3.org/ns/prov#value | - Most of the time, mucus is able to drain out and air is able to flow through the sinuses.When the sinus openings become blocked or too much mucus builds up, bacteria and other germs can grow more easily.Sinusitis can occur from one of these conditions:Small hairs (cilia) in the sinuses fail to properly to move mucus out.
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