Help with Mickey Mouse Platy

[ericsprincess]

Hi, I have a Mickey Mouse platy that has a big lump under its face, not the belly though. Can anyone help me to figure out what it is? And what I can do before it dies?

 

[Lotus]

Welcome to the tank

There are some pictures here that might help you identify what it is: http://www.fishpalace.org/Disease.html

and some diagnostics here: http://www.fishyfarmacy.com/diseases.html

Hopefully, you'll work out what it is.