My husband woke up one morning a few months ago and he had this blue green black stuff all over one of his shoulder. He said it looked like crayon or a bruise. Then this morning my son had it all over his neck and shoulders it happened when they were asleep. Could it be ghosts? We just moved in this house 3 months ago. There was only 1 couple that lived here before us they had this house built for them. Could they have died somewhere else and then came back here?