nerve blocks?

I’m kind of embarrassed to say I haven’t a clue what my treatment plan is actually called.

I get a steroid as my neurologist calls it injected into the back of my head, and it blocks the pain receptors? To my knowledge?

So what is it called when people get nerve blocks? I get my steroid every 3 months, but others seem to say every 4 weeks.

I’m starting amitriptyline and it’s supposed to work in 3 months and work with the steroid because it hurts a lot for me at the end of the 3 month period. I heard mixed info about it.

Curious to how this works, bestow upon me your knowledge guys. Or something like that I can’t really think right now