For me, a flare is when I poo blood. Usually I'll have between 10-20 bloody bowel movements a day. Uncontrollable bowel movements at that! I've had countless accidents, etc etc. The shortest flare I've ever had was a little over a month, the longest flare lasted about
six months, which landed me in the hospital on TPN. I also lose a lot of weight when flaring and can't eat a lot of foods that I normally can when not flaring. Basically I go on either al liquid (Peptamen( diet or low residual. Sometimes, that doesn't help, it just depends on the flare. But, like gumby said, everyone's def of a flare is different. Some folks don't have bloody poo when flaring, but for me, I always have bloody poo.
If you get a chance, check out my blog, I write about
my struggle/life with Crohn's. I break my everyday life with Crohn's "Barney Style" as I started it to educate my family and friends about
the disease. Good luck and please let us know if you have any other questions!!