Does anybody here have a problem with finding large bruises but not knowing where they came from, especially the day after having a nightmare? I get these from time to time, always after a nighmare and on my upper thigh. It usually doesn't show up until later the next afternoon. They can sometimes be really large. I don't thrash around at night or sleep walk. I do sweat a lot, especially when I have bad dreams.

Familiar to anybody? Could I be doing this to myself? It seems likely, but it's hard for me to believe I could create such a large bruise while sleeping.