Yes, I experience some kind of odd sensation or multiple kinds of sensations in my skull.
When I was getting a bit better after my first huge crash, I would often have a feeling that I could only describe as "my brains feel like scrambled eggs?". Sometimes it feels overheated as well. I've had a concussion before, and I can only liken it to that... but I definitely haven't fallen on my head these last few times it's happened.
This sensation would arise when I was straining myself mentally or was dealing with highly emotional situations. It would take time, real rest and solid sleep for it to dissipate. At least a few days, sometimes a couple of weeks. I haven't felt such an extreme sensation my skull for the past few months, except for when I recently, briefly tried taking GABA.. but that was again slightly different sensation? I don't know.
It feels weird trying to explain the sensation. I honestly feel like no one around me would believe me when/if I do talk about it, so I'm glad there are others here who experience at least something similar!