The bottom line question is, when you “soldier on” in spite of a condition and your records don't back you up, what is the best course of action?
Flying training and combat zone pollution have affected my sinuses...that's my nexus for service connection. I have a 0% rating now, for what that is worth.
Here is what the schedule of ratings says about this under DC 6514:
30% - Three or more incapacitating episodes per year of sinusitis requiring prolonged (lasting four to six weeks) antibiotic treatment, or; more than six non-incapacitating episodes per year of sinusitis characterized by headaches, pain, and purulent discharge or crusting