What are the sinuses?
Your sinuses are air filled compartments in your face.  They have a lining that makes mucus that flows out of small holes into your nose.  Typically, one has four sets of sinuses on each side, although some people do not.  It is normal for them to be different on one side or the other.  They are connected to your nose, and drain into it but are separate from it anatomically. Unless you have had surgery, things that you spray into your nose do not reach your sinuses, but only get into your nose.  The mucus can flow out of the sinuses into your nose, but (in general) sprays do not get from your nose into your sinuses. 

* Note: The information contained in these pages is for educational purposes only. It should not be construed as individualized diagnostic and treatment advice.