I was wondering how to know the difference between really dark stools & black tarry stools that indicate a problem? I have been in a flare for about a month now. The past 2 days I have not had bright red blood but instead more of a blackish substance on my stool/toliet paper (Graphic, I know)! Can anyone tell me what this may be a sign or indication of or their personal experiences with this? Or am I just being paranoid?