Chronic sinusitis may lead to inflammation of the mucous membrane of the sinuses of the skull due to spread of infection from the nose. Nasal infection due to nasal obstruction, nasal allergy, habit of forcible, blowing of nose, water entering the nose during diving, barotraumas, dental infection, trauma are common causes of sinusitis. Sinusitis can be cure 100% if patients comes in for treatment at early stage.
