Sinusitis, commonly known as a sinus infection, occurs when the tissue lining the sinuses becomes inflamed or swollen. Healthy sinuses are filled with air, but when they get blocked and filled with fluid, germs can grow and cause an infection. If you suffer from sinus or know a closed one suffering from this condition, you would know how uncomfortable sinus issues can be with headaches, nasal congestion, facial pain and a reduced sense of smell. Read on to understand the common causes of sinus and ways to prevent it…

What Causes Sinus?

There are various reasons why sinusitis may occur including…

1. Common Cold or Viral Infections
   One of the most frequent causes of sinus issues is a cold or other viral infections. These infections can cause the membranes in the nasal passages to swell, leading to congestion.
   
   
2. Allergies
   Seasonal allergies or sensitivity to dust, mold or pet dander can cause the immune system to overreact, leading to inflammation and swelling of the nasal tissues, which can block the sinuses.
   
   
3. Nasal Polyps
   Nasal polyps are small, soft, noncancerous growths that form in the lining of the nasal passages or sinuses. It’s harmless but can block the airflow and mucus, leading to sinus congestion.
   
   
4. Deviated Nasal Septum
   The septum is the thin wall that divides your nasal cavity into two sides. If it’s deviated or crooked, it can create a narrow passage on one side, leading to airflow problems and poor sinus drainage making you more prone to sinus infections.
   
   
5. Environmental Irritants
   Airborne pollutants like cigarette smoke, vehicle emissions, industrial fumes or even strong household cleaning agents can irritate the nasal lining. Continuous exposure to these inflames the sinuses and disrupts mucus flow, which increases the risk of developing sinusitis.