Weird growth on emerald rainbow

[Potluck]

So here lately I've had issue after issue starting with ich, then a sudden death of my last Dwarf neon rainbow that was extremely healthy, the rainbow has had this for quite some time but here recently is gotten more red with looks like a pimple in the middle, I've never seen anything like it before and can't find anything on the internet about it except myco something or fish TB, she has no curvature side to side but there is a raise where this bump thing is, she eats like a pig, very active, not skinny very happy fish, but this is worrying me as I don't know what it is and how to treat it. Pics attached


Water parameters are
0 ammonia
0 nitrite
15 nitrate
Gh 5.5
Kh 6
Phosphate 1.5-2.0
Temp 79

 

[coralbandit]

Could just be lymphocystis.Look into it and see if it matches up.
Lympho is viral and has no cure[like a cold].
Sometimes it just goes away,othertimes fish live with it.

 

[Potluck]

Ty will do, was hoping it wasn't the columan...... Word