What is sinusitis?
Sinusitis is the inflammation or infection of the sinuses, the air-filled cavities in the skull that help filter and humidify the air we breathe. It often develops after a cold or respiratory infection when the sinuses become swollen and blocked, trapping mucus and allowing bacteria or viruses to grow. This can lead to symptoms such as nasal congestion, facial pain, pressure around the eyes, and headaches. While most cases are viral and resolve on their own, bacterial sinusitis may require medical treatment.