hello and welcome to HCM,
The bold letters in the scan reports mean nothing much unless there is a mass or a fungus involved so a blocked sinus means that you have sub clinical sinusitis
or a sinus problem according to the scan.
You should remember that this picture can also be seen in a case of mild cold
or respiratory infection also so a single scan study is not conclusive.
The most important factor to consider is your own symptoms which prompted the ENT to perform a scan. If you are having persistent headache and nose block and heaviness which are severe and which are recurrent then you must definitely get treated first medically and later on if there is no relief, then consider a sinus surgery
You can also do steam inhalation to clear out the sinuses
If you do not have any symptoms and the scan was just a part of routine assessment then you do not have to bother much about the findings
Dr Sriram Nathan