Help with aquarium fish - what disease is this?

Hello.
My barbus has been "growing" this formation-like thing around his eyes for about two weeks now. The other fish in the tank are fine. I would love to hear suggestions about this formation, is it treatable and how to get rid of it. I couldn't find anything in Google.

*Edit:
I put him in a salt bath and stressed him quite a lot, but he's fine now. I don't know if the condition is treatable with salt solution, but I have no better ideas at this point...
#fishdisease
#fishillness
#aquariumfish
#barbustetrazona

Видео Help with aquarium fish - what disease is this? канала chocoholic