The best way to take a picture of dropsy is to put the fish in a clear container and take a photo from above so you can see the scales sticking out.
His fins look pretty clamped and he does look bloated from what I can tell from the pictures.
Like already said, dropsy is a symptom of something, not a disease in itself. Without knowing what you're treating it's a bit of a battle. If his scales are definitely visibly sticking out I think it's gone beyond a pea for constipation, but is it even feeding anyway? A bath of epsom salts might draw the fluid out but wont treat the cause. Anti bacterial medication might help in the short term but in my experience (just my experience before anyone rips it apart) fish treated this way are left very weak and sickly anyway and usually get recurrent problems until they die anyway.
Follow the course of action which seems right to you. Me, personally, I would clove oil the fish, or leave it separate from the tank like I said in your other thread.