It should look pretty similar in all species I'd think anyways. If you look at the I think it's the first pic I uploaded you can see where it eating away at the scale. If he has clean, and complete normal looking scales it probably isn't scale rot. But I'm sure if you post some pics all of us can figure out whats up with this little guy. The fact that it's right in his intestinal tract sounds like he's constipated and has to
Poop. Where even with that a good soak would be very helpful to him as well.