A sinus infection, also known as rhinosinusitis, is an inflammation or swelling of the tissue lining the sinuses. The sinuses are small air-filled spaces in the skull that help to make mucus and filter out bacteria and other particles from the air we breathe. When these sinuses become blocked and filled with fluid, it can create a warm, moist environment where bacteria can grow, leading to an infection.
Symptoms of a sinus infection include facial pain or pressure, nasal congestion, runny nose, headache, fatigue, and bad breath. These symptoms can be caused by various factors such as allergies, colds, or other viral infections. However, when the symptoms persist for more than 10 days despite treatment with over-the-counter medications, it is recommended to see a healthcare professional who may prescribe antibiotics or other treatments depending on the severity of the case.