I'm so glad to see folks posting about this.
Problems with my ears remain one of my biggest PCS problems. I have ringing, sharp stabbing pain and periodic deafness. My deafness usually lasts for a few seconds at a time several times a day. However, I have experienced deafness that has lasted up to a week. Thankfully, it has never struck both ears at the same time.
My doctors have done nothing for this problem. (Yes, I know you're all shocked. lol) They just told me that I have to "get used to it." The only explanation I was ever offered is that my auditory nerves were probably damaged by the whiplash that caused my concussion. Most doctors have looked at me like they thought I was making it up.
Cheers