I was diagnosed with crohns colitios in 2011. I'm still learning new things about it every day. I've been flaring up now on and off for 3 weeks now. Its at its worst of an evening time. How long do flare ups last? The last 2 nites I've taken Tramado for the pain, I don't want to take them every nite cos I don't want to rely on them, so I'm manning tonite out. Does anyone flare up on and off for weeks on end?? Please help I'm getting so fed up with being ok one min and in pain the next :'(