I was wondering if anyone had any sinus issues after your concussion?

I get a dull and sharp pain from time to time on the right side of my head, somewhere between the eye socket and the nasal cavity. At first I thought it was a head cold, but then as the weather changes, it comes and goes.

I can also smell a foul smell. Doctors say it might be old mucus but it hasn't gone away. It smells like either my brain is burning or iron-like (like from blood). It gets marginally better when I drink more water.