First off...where is the blood? Is it in the stool, in the water, or just on the paper? If it is in the stool...it could be a flare. If it is just the water..it could be a flare or a hemmie/fissure. If it is just on the paper, it might be a hemmie or fissure.
Try using some Preperation H for a couple of days to smooth yourself and reduce the inflammation. Also, if you can, see a doc. He can get a better view down there than you can
Feel better and good luck
36 yr old Male with Crohn's Disease since '88 - No Surgery yet
Been on almost every type of drug with bad results
Remicade since Nov 2009
Prilosec 20.6mg - 2x a day