So I've had 4 black neons in the community tank since i started the tank about 3 months ago. Well one of them has by its head on the one side, what i could describe as a fish flake stuck to it...its not tho lol it's a reddish/pinkish tinge. anyone have any ideas? I thought it might just be a sore from one of the other fish or my catfish(tho he rarely ever moves even at night..) cuz it looked a little fleshy when i get a glance of it. I treated with melafix with hardly any result.(didnt read about melafix/pimafix till afterwards) should i treat with something else or how should i handle this?

P.S. my boyfriend says flush it but I dont have the heart to do that lol