Doctors often refer people with skin blemishes for an expert opinion, just as a precaution. I had one checked out a while back, and it was innocuous. It's highly likely that your daughter's is completely harmless too, so try not to worry. As they say, "Never trouble trouble 'til trouble troubles you!"
Your post reminded me of a shop I saw, quite a long time ago, when visiting my family in Australia. On the window it said, "Have your moles tracked." I am a bit slow on the uptake sometimes, and said to my daughter, "I didn't know that you had any moles over here, and why would you want to track them anyway?" She was very amused at the mental picture of someone crawling down an underground tunnel, complete with magnifying glass, tracking a mole." For obvious reasons Aussies have now become very aware of sun damage causing skin cancers, and get them checked out as soon as they notice any blemishes or changes to existing moles.
I hope that your daughter quickly gets the all-clear, and puts your mind at rest.