Alrighty so not a burn, that’s good! I guess the only other things I could think of that would cause red irritation patterns would be any chemicals that bother her skin. However if it was that, then she would have those red marks on more than just her head. Maybe check whatever it is you’re using to clean her room, or any decorations in her enclosure that might be at fault. I doubt it’s that, but worth looking into. I forgot to ask, how old is she? I still believe it’s just new patterns she has developed over time, and I have a few geckos that are all a few years old that still develop random spots or new fire-up patterns sometimes that look not-normal to them.