Sinus symptoms and signs are caused because of infection of sinus and resulting causes the swelling because of bacteria within the cavities of sinus. The sinuses are the cavities which are open in the continuous connection with nasal openings which are free for both air and mucous. At this situation, sounds certain type of volume. When sinus gets blocked because of certain swelling and infectious air already present inside the sinus then this situation causes the sinus headache. Another reason for sinus pain is that when nasal get blocked because of swollen and air unable to get into the sinus. Sinus spray is generally used as a treatment for the sinus infection which is sometimes prescribed and gotten over the counter. This spray is is useful for killing the bacteria and microbes which causes severe sinus infection symptoms. There are four major pairs of the sinuses which are listed below: Maxillary sinuses (behind the cheek bones) Frontal sinuses (in the forehead) Sphenoid sinuses (b...