I have told you the reason your hyperacusis has returned
@uae96 believe me I have corresponded with many people like yourself over the years with "noise induced tinnitus". They habituated and think everything is fine and they can return to using headphones and go clubbing not realizing the dangers of both. Then the tinnitus increases and won't reduce to it's previous level and find they cannot cope. I am not saying that you cannot go clubbing or go to a concert but you have to be very careful and don't put trust in earplugs.
Under no circumstances do I advise using headphones even at low volume, when the tinnitus was originally caused by "exposure to loud noise"
A member of this forum contacted me a few weeks ago after habituating to tinnitus for 6 years. The tinnitus was originally caused by exposure to loud noise. She thought she was fine and began using headphones at low volume. Within 1 week the tinnitus increased and now she cannot cope or return to work.
The choice is yours but if you don't want to believe what I'm telling you then continue using headphones, and going clubbing and you will eventually realize when it's too late that I am right.
I wish you well.
Michael