The sinuses are a connected system of hollow cavities in the skull. The largest sinus cavities are around an inch across, others are much smaller.
The Sinus Include
The Axillary Sinuses (largest), in cheek bones.
The Frontal Sinuses, in the low-center of the forehead.
The Ethmoid sinuses, between eyes ,at the nasal bridge.
The Sphenoid sinuses, in bones behind the nasal cavity.
The inside of the nose has ridges called turbinates.Normally these structures help humidify and filter air.The nose is divided in the center by a thin wall called septum.Most of
the sinuses drain into the nose through a small channel or drainage pathway called the middle meat us.
Acute sinusitis (sinus infection): Viruses or bacteria infect the sinus cavity causing inflammation. Increased mucus production, nasal congestion, discomforting the cheeks,
forehead or around the eyes and headache are common symptoms.
Chronic sinusitis (or chronic rhino sinusitis):More than just a series of infections,chronic sinusitis is a persistent process of inflammation of the sinus.
Allergic rhinitis: Allergens like pollen, dust mites, or pet dander cause the defenses in the nose and sinuses to overreact. Mucus, nasal-stuffiness, sneezing and itching result.
Deviated septum:if the septum that divides the nose deviates too far to one side,airflow can be obstructed.
Turbinate hypertrophy: The ridges of the nasal septum are enlarged,potentially obstructing air- flow.
Nasal polyps:Small growths called polyps sometimes grown the nasal cavity,in response to inflammation.Asthma,chronic sinus infections and allergic rhinitis can lead to nasal
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