Is this the same way it looked last time or is this different? I was thinking last time that it appeared in one spot ... more like a small abscessed area from a wound or something. This being on the abdomen and on both sides worries me. Has he been hiding out more ... like wanting to be off to himself?

I would get him to the vet and get him/her to do a belly tap for fluid.

((((((((((HUGS))))))))))))))