Going by how I am NiceCupofTea I think the FC result isn't indicative of symptoms. Also things like blood and piles inflammation may elevate it who knows. At the end of the day it's a test that's probably not 100%. I have mild Colotis often with no symptoms but high scores.
You're right about the bleeding. Probably Hemmies but how can someone actually say for sure?
I asked about
the meds for a reason >_>. NSAIDs and PPIs are known to give false positives, i.e. elevated FC. Mind, 600 seems pushing it, but I don't really know. You may be right about
the piles inflammation - again, I don't know! Does your GI have any opinion on your high FC?