I know DG have several issues, I've had one (in a previous setup) die to dwarf gourami disease in a week's time. This looks totally different.
I went to sleep and checked the tank, nothing wrong with him. Woke up and all of a sudden I see this lumpy thing on his face.
He has been in this setup for 1.5 year. There has been no aggression towards him whatsoever. I got kuhli's, cardinal tetras, corycats, pseudomugil furcata and a female blue ram in the tank. Tank parameters are fine and I do weekly 40% water changes every friday.
He's not acting like he's jn pain, doesn't hide. Doesn't really show any change in behaviour. So I think it must be an injury (maybe driftwood?).
Sent per three-eyed raven..