This morning I woke up to notice marks under my skin. The marks appear on the back of my right thigh, near the top. They look like red scratches, accompanied by a few purple bruise-type marks, but this is all under the skin - running my hand over them I can't feel anything, they're not raised at all.
They don't itch and I have no pain. I have no other symptoms as far as I can tell, apart from a slight headache (but that could easily be because I just woke up!).