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Sinuses

Sinusitis

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Sinusitis

Sinusitis refers to inflammation of the sinus cavities, which are moist, hollow spaces in the bones of the skull. There are four pairs of sinuses: Frontal sinuses; Maxillary sinuses; Ethmoid sinuses; Sphenoid sinuses (not shown in illustration. If the opening from a sinus cavity becomes plugged, the flow of mucus is blocked and pressure builds up, causing pain and inflammation.

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Definition Alternative Names Causes, incidence, and risk factors Symptoms Signs and tests Treatment Expectations (prognosis) Complications Calling your health care provider Prevention References

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Centers

·As a Disease/Condition

Sinusitis

·As a Complication

Acute Upper Respiratory Infection (URI)

Rhinitis (Runny Nose)

·As a Symptom

·As a Risk Factor

Nosebleed

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