Random scratches all over me??

So today I noticed I had claw marks on the side of my right thing and in the inner part of my thigh. I'm not really sure why they appeared. I haven't scratched & my nails are very short (as pictured). I don't own a cat, nothing like that has clawed my leg. Has this happened to anyone else? It's really weird to me. I noticed them cause they were starting to burn alittle