I don't think tinnitus spiking makes hearing worse although I can't be certain of this. I believe it can make tinnitus worse. Tinnitus can spike for a number of reasons. It could be that you have hyperacusis (sensitivity to sound) if this hasn't been treated or healed by itself then it can cause tinnitus to spike. Exposure to loud noise can also cause tinnitus to spike. Please click on the link below and read the post.
All the best
Michael https://www.tinnitustalk.com/threads/are-spikes-from-loud-noise-permanent.18156/
A spike can happen for many reasons. I believe a spike comes about when we shock ourselves or our body/ears. I don't think its fully related to hearing loss. Excitement/fear do a lot to tinnitus and the human body/mind....
Now, if you go to a super loud spot and stay there for awhile, you could get a spike in your tinnitus as well....