Crohn's Disease & Ulcerative Colitis Support Group
Crohn's disease is a systemic inflammatory bowel disease (IBD) of unknown cause, that results in chronic inflammation of the intestinal tract. It can affect the entire gastrointestinal tract from mouth to anus, and can also cause complications outside of the gastrointestinal tract. There is no known medical or surgical cure for Crohn's disease, but there are many medical...

Inflammation markers are really only a cluel, not a definitive answer to whether your disease is active or not. He may just want to see the state of your colon to be sure.
I hope you get the infection fixed and avoid a needless scope. At only 2 years in, you shouldn't need expensive surveillance colonoscopies for another 6-8 years. Good luck.
I'm surely going to talk to my GP about this...I cannot afford another scope, I'm not having any flare symptoms, and it's pretty clear I have an upper respiratory issue.
The last colonoscopy I had was when I was diagnosed. My doc at the time said I shouldn't need another one for around 8 years. I guess my problem is that my GI wants to do this colonoscopy for exploratory reasons. Rather than taking care of the sinus issues first--as well as my anemia from my flare--and then seeing what the inflammatory markers are in another blood test, he wants to do an exploratory colonoscopy that'll cost me almost $700 out of pocket.
And yes, the inflammation markers only tell you that there IS inflammation in your body. Not where.
That would likely be why he wants an exploratory, to see if you have any polyps that need removing, and general check the state of the disease.