Looks like she just rubbed up against something. Is there something in her cage she's rubbing on? I would guess this will be corrected with the next shed.
I always keep Neosporin (the kind without the pain killer) around for little scuffs and such like this. It won't hurt to put a little on there, make sure the cage is kept clean to avoid bacteria/fungus moving in.
I would also check her cage out and see if there is something with a sharp edge that she is rubbing on...hide box maybe?
Other than that, monitor it and wait for the next shed cycle would be my advice.
I've seen this before back when I was a newb with the humidity too low. She most likely just had a bad shed. It should go away next time she sheds, just raise the humidity more while she's shedding.