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Sinusitis is an inflammation of the sinuses, the cavities around the nose. Sinusitis can be caused by a variety of factors and often results in very uncomfortable symptoms. To better understand this condition and find adequate relief options, here are the different causes, symptoms and treatment options for sinusitis. Sinusitis can be caused by several factors: a viral or bacterial infection, allergies, nasal polyps, a deviated nasal septum or chemical irritants. Viral infections are the most common cause of sinusitis. It is also possible to have sinusitis caused by a bacterial infection, but this is less common. When the infection is bacterial, the pathogen in question is Streptococcus pneumoniae (pneumococcus) or Haemophilus influenzae in 70% of cases. The chronicles and video capsules in the Index Santé directory allow you to learn more about physical and mental health. Full article on sinusitis to read on Index Santé: https://www.indexsante.ca/chroniques/....