Chronic sinusitis lasts for more than 8 weeks. It can be caused due to allergy, environmental pollution or bacterial infection. Sometimes abnormally narrow passages which restrict drainage from sinus cavities can also cause the same.
Chronic sinusitis lasts for more than 8 weeks. It can be caused due to allergy, environmental pollution or bacterial infection. Sometimes abnormally narrow passages which restrict drainage from sinus cavities can also cause the same.
