White Lumps On Platy's Head

Hi All!
I've had a a lovely red, white, and black platy (I believe the LFS called her a tricolor) for about 1 year now. A couple of months ago, my husband thought that the red patch on her 'forehead' was looking larger, with some white marks, and kind of lumpy - we assumed this was just a part of her changing as she got older. She is quite shy, only comes out to eat, and hides away when I get my face to close to the tank - so I've never really gotten a good close look at the area (until now).
This morning I noticed that some red scales in the area appeared to be loose, like they are peeling off. So - I decided to net her & get a good look.
The red patch has white bumps popping up through it, they look almost like white blisters, and there is definitely some loose red scales (you can kind of see this in the second picture). She still looks perfectly well.
Is this disease, or something normal?? I didnt post this in the emergency section - as it's obviously been going on for a while. None of my other fish are affected in the same way.

Thanks!!

i dont know what it is but it dont look to good

look's like a fungal infection.
So the red in that area has always been there, just looking larger, perhaps it infected thus making it look larger.

I would use melifix or myxazin to treat it.

If you dont have these and want to tread instantly get a liter of water and add 30g of salt, place it in their for 30-60 seconds, the fish will not like it but this dose work and then treat as i said before too as soon as u can.