So a few days ago, I was playing with my kitty, just the norm.. scratching
him, rolling around with him.. you know!  Anyways, he walked past me and I
noticed that the area around his butt (probably like a 2inch x 2inch area)
was not right.  So we ended up taking him over to the sink and just cleaning
the area.  I noticed it again a couple days later, and we did the same thing.
I noticed it again this morning, and I was on my way to work, so i just told
my mom quick.  She cleaned it up again, and said that he was fine.  And then
he walked into the next room and vomited.  She went to go clean it up and
said that it smelled purely like feces [poop].  Now, about 2 hours later.. we
notice his butt AGAIN!  This time I looked REALLY close and it looked like
dried blood.  And when she was done cleaning the area, I took a look again
and it all just looks raw.  

It doesn't look like blood is coming out of him, but then again I'm not 100%
sure on that either.  And he doesn't act like the area hurts either!  I'm
dumbfounded and scared.  I don't want him to get put down, and I'm very
worried about this.

Does anyone have ANY ideas about what this could possibly be?  Is the poop-
smelling vomit linked to the bloody butt area??  I really don't know.

Thanks guys!!