This article explains the main causes and common triggers of sinus infections, emphasizing how infections, allergies, and environmental factors contribute to sinus problems. Understanding these factors helps in prevention and management of sinus health for better breathing and comfort.

Sinuses are air-filled cavities nestled within the facial bones, including the forehead, cheeks, and around the nose. They produce mucus that keeps nasal passages moist and traps harmful particles. Sinus problems often occur when infections or allergies cause swelling inside these sinuses, blocking normal drainage. This blockage leads to congestion, difficulty breathing, and sometimes changes in voice. Factors such as viral illnesses, allergic reactions, bacterial invasions, nasal polyps, exposure to smoke or dust, and environmental changes like flying or diving can trigger sinus issues. Preventing these risks supports healthy sinus function.