@MattH- - Glad that this could be helpful! I thought I'd share an update with you and others who are following my Eustachian Tube saga.
I had a tympanometry performed a few days ago, at
@Lisa88's encouragement, and my Eustachian Tube function was found to be "normal." This was pretty disappointing, because it suggested that if I do have problems with my Eustachian Tubes, they aren't adversely impacting my ability to pop or clear them. If anything, it looks like I can pop my ears very frequently and readily - even though I struggled with this during my flight. So, it was back to the allergies as a possible cause of my inflammation.
I went to see an allergist, and it was confirmed that I have a strong histamine response to
dust and mold, which while unsurprising does actually match up to the timing and sequencing of when my T started in November 2014. I didn't have any obvious allergies anywhere else. It is going to take some time (weeks, months) to fully figure out what allergies are triggering my inflammatory responses and then how to address those allergies through medication and environment.
In general, a couple of other things I noticed:
- My T gets a lot worse when I am not properly hydrated, don't get enough sleep, or eat too much salt.
- Anti-inflammatories help, but so do diuretics. Hydrochlorothiazide, which I had stopped taking a while ago because it wasn't strictly necessary to control my blood pressure anymore, was useful in reducing the volume of my T. This is strange because Hydrochlorothiazide has known ototoxicity associated with it in some rare cases. I suspect that the benefit here is in the removing of sodium from my body, which in turn lowers my swelling and inflammation.
I've also been researching quite a bit why inflammation, no matter the origin, seems to have some otological side effects and I came across a series of studies that address the
Eighth Cranial Nerve as the neurological origin of Tinnitus. This is highly controversial because vascular decompression, as a procedure, has been known to cure people of Tinnitus, but there is some risk of stroke or death (2-5%) following this operation given its proximity to the brain stem. Additionally, doctors feel that it hasn't been done frequently enough to warrant the risk and they usually only reserve it for cases where people become suicidal due to the impact that their T has on their lives. Finally, it's also very difficult - if not outright impossible - to diagnose vascular compression as a cause of tinnitus, because in about a third of all humans, the Eighth Cranial Nerve is naturally compressed and it causes no otological side effects.
Even so, inflammation can further compress the Eighth Cranial Nerve to a "breaking point", producing tinnitus (usually unilateral, sometimes bilateral). An anti-inflammatory regimen can reduce the inflammation and, in turn, lower the volume of Tinnitus to nearly unnoticeable levels.
PubMed has some reading on this here:
http://www.ncbi.nlm.nih.gov/pubmed/20305490 suggesting that people who have suffered from unilateral Tinnitus for less than 4 years are most likely to benefit from microvascular decompression surgery. In my case, because I have bilateral tinnitus (though more expressed on the left side), it's doubtful I would be a good candidate. Even so, because of the inflammatory and neurovascular dynamic of my tinnitus, I am tempted now to see a neurologist to explore options.
As for my relief -- I continue to have good days (where the T is barely noticeable) and really bad days (where the T is louder than it has ever been). The bad days seem to correspond to days when I skimp on the anti-inflammatory treatment (I should really know better by now!) or when I don't get enough sleep. This leads me to really conclude that inflammation is the general aggravating factor in my tinnitus and while it may not be the outright cause, it certainly is the circumstance that has led me to great distress over it.