my friend is having weird dreams

[hmaster117]

Okay my friend has been having these weird dreams where there would be this girl in the background just standing there not moving. I thought nothing of it but she has been getting a little freaked out by it. Last night she had a nightmare where she was running through the snow until she fell and the girl was chasing her, she then started cutting my friend's face until she woke up. She didnt get a better look at the girl's face unfortunately and i dont know what to make of this. Can someone please help me and her?

P.S: She doesnt watch any scary movies or anything like that and she doesnt think of anything that would relate to this before she goes to sleep either.