No real trigger, but everything around you irritates you?
Every story you read is juvenilely stupid?
The people you care about keep having to read you stupid stuff and won't let you concentrate?
Even stories where they are obviously reading the late chapters of the manga fall back on the early anime interpretation of character behavior?
Where even the sound of a bottle of pills being rattled gets on your last nerve?
But you don't feel like repairing the holes that you really want to punch in the walls?
But on a good note, you get a glimmer of maybe how to make the transition from one phase of what you're writing to the next? And then you wonder if you get yourself in these types of moods just to trigger the need to write?
Just grrrrrr.....Maybe I need to go drink a beer.