Get Sinusitis Prevention with advanced chronic sinusitis treatment In Hyderabad. Sinusitis is an inflammation of the sinuses, usually caused by infection. If you have nasal congestion, facial pressure, cough, and thick nasal discharge, you may have rhinosinusitis, commonly known as sinusitis. Your sinuses are hollow cavities in your cheek bones, around your eyes and behind your nose. They contain mucus, which helps to warm, moisturize and filter the air you breathe. When mucus usually prevents anything from drying out, infection can occur. Acute sinusitis: Acute sinusitis refers to the symptoms of sinusitis in less than four weeks. In most cases, the cold begins. Symptoms often go from one week to 10 days; But in some people, bacterial infection can develop. Chronic sinusitis: Chronic sinusitis, also called chronic rhinosinusitis, is often diagnosed when the symptoms are over 12 weeks, despite medical treatment. People with allergic rhinitis or asthma are more likely to suffer from chronic sinusitis. When allergic rhinitis or asthma, the airways can become inflamed. Sinusitis infection, a fungus, nasal septum, nasal polyps or, in rare cases, an immune system deficiency.