White spots can anyone help me please

[Beckie2020]

Hi all can anyone help me please I had my Axolotl for I think about 3 years now about a year ago she got a white spot on her nose which in the last couple weeks has got bigger and now another on her tail and one on the back of her head she is eating as normal she is swimming a little more the temp is sitting about 20 degrees I do a 30 percent water change every week to make it colder again I’m struggling this year with the heating I think it’s warming her tank up. I went to where I brought her and got the water tested all fine I’m really struggling with looking on here and speaking to the centre I got her form what the spots could actually mean please can anyone help me

 

[Murk]

Looks like normal pigmentation to me, unless I'm missing something?
It's not uncommon for wild types to grow lighter spots in time (see also my profile picture, for example).

The spots aren't fuzzy or sticking out, right?

 

[Beckie2020]

No they are flat no fuzz her gills are also fine I believe thank you so much you have put my mind at Ease Beckie

 

[Calgarycoppers]

Wild types I find change all their life. Just pigmentation if its flat and not fluffy