There’s been a few discussions about Eustachian tube dysfunction, I did a quick search & found this one which you might find helpful, it mentions the chorda tympani nerve, a small branch of the Facial nerve (cranial nerve VII), which could maybe be a cause of some of your symptoms? Here’s a link:
Unusual ear symptom - General - Living with Eagle
It sounds a bit coincidental that you’re getting this after surgery, especially if others have had similar symptoms after surgery with Dr Hackman- hopefully it is irritated nerves and will settle with time.
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