Sinus Infection (Sinusitis): Causes, Symptoms & Treatment
https://my.clevelandclinic.org/health/diseases/17701-sinusitis
WEBMar 9, 2023 · Sinusitis is an inflammation of the tissues in your sinuses (spaces in your forehead, cheeks and nose usually filled with air). It causes facial pain, a stuffy or runny nose, and sometimes a fever and other symptoms. It’s usually caused by the common cold, but other viruses, bacteria, fungi and allergies can also cause sinusitis.
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