Principle purpose of this article is to discuss on Chronic Sinusitis, which is a Difficult Stage of Sinusitis Infection. Chronic sinusitis is a constant provocative condition which might be caused due to one or more sinuses. It is this advanced stage of sinus infection. Acute sinusitis infection usually develops quickly nevertheless it lasts for a shorter duration of time. When it lasts longer when compared to a time, it is reportedly sub acute sinusitis. Here explain various reasons of getting chronic sinusitis – Common cold or flu, Tooth infections, Blockages. Here also analysis some other reasons like: Diabetes, Smoking, Nose tumors etc.