No connection: The sinuses are air pockets inside the facial bones. They are connected with the air passages of the nostrils. From time to time, due to allergies or disease, the lining of the sinuses drain excessive fluid into the nose or back of the throat. The sinuses are not connected to the back of the head. If sinus discharge is bothersome, an ENT specialist could look inside and diagnose the cause.
Answered 5/22/2014
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