Duration of sinusitis
Acute sinusitis usually heals within a few days to weeks. There are two types of sinusitis, depending on their duration. One speaks of a chronic sinusitis if the symptoms persist for more than 2 to 3 months.
Chronic sinusitis usually results from an unhealed acute sinusitis and often affects the maxillary sinuses and ethmoid cells. Long-lasting loss of smell (anosmia), chronic, watery rhinitis, permanent, dull pressure above the paranasal sinuses and secretion flow into the throat are common symptoms of chronic sinusitis. Chronic sinusitis is promoted by permanent constrictions in the paranasal sinuses, nasal polyps, special pathogens or a weakened immune system.
