Sinus Infection (Sinusitis): Causes, Symptoms Treatment Sinusitis is an inflammation, or swelling, of the tissue lining your sinuses Sinuses are structures inside your face that are normally filled with air Bacterial infections, viral infections and allergies can irritate them, causing them to get blocked and filled with fluid
What’s causing your sinus trouble? - Mayo Clinic Press Sinus pain and discomfort typically starts when your sinuses become irritated and inflamed, causing swelling that can narrow or close off the openings This makes it hard for mucus to drain out of your sinus cavities Mucus and air pressure build, causing a feeling of stuffiness and congestion
Sinus (anatomy) - Wikipedia A sinus is a sac or cavity in any organ or tissue, or an abnormal cavity or passage In common usage, "sinus" usually refers to the paranasal sinuses, which are air cavities in the cranial bones, especially those near the nose and connecting to it
What Are Sinuses? Causes, Symptoms Best Ways to Treat Them The sinuses are air-filled cavities located in the bones around the nose, eyes, and forehead Their main role is to humidify and filter the air we breathe, lighten the skull, and enhance the resonance of the voice
How to Get Rid of a Sinus Infection - Healthline What causes a sinus infection? A sinus infection occurs when the tissue in the sinuses swells up This leads to a buildup of mucus, pain, and discomfort