I think writer's block is a little different for everybody. Here's what writer's block looks like for me:
Me: Okay Chapter 24, what's happening?
Brain: wait I have a really really REALLY good thought for Arc 4
Me: ...Arc...4? We just started Arc 2.
Brain: yeah yeah yeah but hear me out
Me: *sigh* Okay, I wrote down the idea in my notes doc. Back to-
Brain: You should add some notes to your previous chapters to help keep things straight going forward
Me: Okay a valid suggestion, but this isn't really helping me with-
Brain: oh oh oh I have an Arc 2 idea
Me: Is it for this chapter?
Me: *groans* At least I have the notes still open. Can we just focus on this chapter though?
Brain: actually gonna daydream about chapter 60
Me: Chapter 60? I don't even know what's happening in chapter-
Brain: do you wanna scroll through Tumblr for a bit?
Brain: *drags me by the shirt collar*
Me: We have to write chapter 24!! I'm really REALLY trying to think of how to move forward here!
Me: You just want to avoid writing this chapter with me
Brain: I've got another idea for Arc 4
Me: NEED I REMIND YOU THAT WE'RE STILL IN ARC 2