Girls, do you ever have bruises in random places on your body that you don't know how they appeared?

My girlfriend randomly gets bruises on places that they shouldn't appear on her body. She doesn't feel pain and she doesn't know how she got them. She also gets bruises that she knows the cause of, but she gets a fair number that she doesn't know how they appeared. Does this happen to you?

Girls, do you ever have bruises in random places on your body that you don't know how they appeared?
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