Every couple weeks I wake up in the morning to see what looks like gashes at least a few inches long. If this is relevant they are vertical. Don't recall how they got there. Is it possible they could just be I scratched myself really hard in my sleep? I do know the marks are not flat. They are raised a bit. The marks are a darkish red. Okay darkish is not a word but don't know how else to describe the color. Is this enough info for you? Going on for several years. Is it possible to self harm in one's sleep?