I'm afraid to tell you that once your ear is damaged, it's permanent. The condition symptoms are (in this case) a constant `ringing' in the ear (especially at night and first thing in morning) and an `over sensitive' response to high frequency causing discomfort. I can confirm this because i have it. Can't describe its level. But in my opinion, its not so that you have it worse at night or wake, it just seems that this permanent "noise" (very high pitch in my case, its like a 14khz or something) gets masked easily (in my case) with outside noise. When everything "outside" is silent, the noise becomes very apparent. I can't also stand certain high pitched noises, in my case not from TV or monitor (maybe im just used to) but example, a gas kitchen set in a very low, almost closed position emits this high pitch noise i can't stand. I also hear it in some diesel bus i use from public transport (near the engine, at the back) it really drives me nuts How it happened to me? Some guessing: First when i was more young my parents used to take me "too much, and too many times" to parties with very loud speakers. Also when i was like 15 or something a firecracker (inside a plastic tube that blew as well opening my hand) exploded from my closed hand, it made me really deaf for like 15 mins (couldn't hear my own voice, not even yelling) and the "ringing" was so strong it made my head hurt so much and i didn't notice for like 2 mins that the hand where i had the cracker got hurt a little with some little bleeds and all... My memory tells me this kind of noise in my head used to go away after sleeping from a long party, but from some years since, the noise didn't go anymore and its with me, always. I don't think its so loud tho, its easily masked with any subtle noise. I guess my condition could be much worse, and i don't know what others are experiencing. Never gone to any doctor to check it.