Hello sir. Since you have developed pain at the back of your head after the fall, it is only likely that the finding of mucosal thickening in the ethmoidal sinus
is a coincidental one. It is significant only if you had been aving constant headaches
before the fall, nasal block, recurrent cold, etc. You can take paracetamol
tablets for the pain presently, and assuming that there was no other abnormal finding in the CT scan
of brain, I dont think there is anything you need to worry about. The pain is mostly only because of the fall.