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Symptoms usually go away within 7–10 days but can last up to 4 weeks. chronic sinusitis is when symptoms last more than 12 weeks or return three times within a year. See full list on mayoclinic. org. More Киста В Матке images. See full list on mayoclinic. org. Acute sinusitis symptoms and causes mayo clinic. Common causes of chronic sinusitis include: 1. nasal polyps. these tissue growths can block the nasal passages or sinuses. 2. deviated nasal septum. a crooked septum — the wall between the nostrils — may restrict or block sinus passages, making the symptoms of sinusitis worse. tiga. other medical conditions. the complications of conditions such as cystic fibrosis, hiv and other immune system-related diseases can lead to nasal blockage. 4. respiratory tract infections. infections in your respirat Acute sinusitis complications are uncommon, and serious symptoms ke sinusitis complications are rare. if they occur, complications might include: 1. chronic s...