How long has it been doing this? I agree with the temp. check that it is not to hot.
It may be hard to find a vet that treats salamanders but you may look anyway.
See if she eats or drinks at all too.
I have a shelter rescue that I got yesterday and he doesn't want to eat or drink. He throws up a little bit a few times a day. He isn't very active and I am not sure what to do for him. I have the same food he was eating at he shelter so I know he is used to it.
Just hoping that some of you...