The sinuses are a connected system of hollow cavities in the skull. The largest sinus cavities are about an inch across. Others are much smaller.
Your cheekbones hold your maxillary sinuses (the largest).
The low-center of your forehead is where your frontal sinuses are located.
Between your eyes are your ethmoid sinuses.
In bones behind your nose are your sphenoid sinuses.
They’re lined with soft, pink tissue called mucosa. Normally, the sinuses are empty except for a thin layer of mucus.
The inside of the nose has ridges called turbinates. Normally these structures help humidify and filter air. A thin wall, called the septum, divides the nose. Most of the sinuses drain into the nose through a small channel or drainage pathway that doctors call the “middle meatus.”
Why do we have sinuses? Experts don’t know. One theory is that they help humidify the air we breathe in. Another is that they enhance our voices.
Acute sinusitis (sinus infection): Viruses, bacteria, or fungi infect the sinus cavity, causing inflammation. More mucus; nasal congestion; discomfort in the cheeks, forehead, or around the eyes; and headaches are common symptoms.
Chronic sinusitis (or chronic rhinosinusitis): More than just a series of infections, chronic sinusitis is a persistent process of inflammation of the sinuses.
Deviated septum: If the septum that divides the nose is too far too one side, airflow can be blocked.
Hay fever (allergic rhinitis): Allergens like pollen, dust mites, and pet dander cause the defenses in the nose and sinuses to overreact. Mucus, nasal stuffiness, sneezing, and itching result.
Nasal polyp’s aresmall growths in the nasal cavity. They can happen due to inflammation from asthma, chronic sinus infections, and nasal allergies (such as hay fever).
Turbinate hypertrophy: The ridges on the nasal septum are enlarged, which can block airflow.
Having a stuffy nose can be highly unpleasant, and is most often a result of colds, allergies, and even weather changes.
However, before you turn to medications, you should know that you can relieve the stuffy nose, ears, or a stuffy head by pressing one pressure point.