Blood from a cut
Red blood at a small wound — visible proof of an injury that has just broken the surface.
Blood from a cut in a dream is the dream's image of visible proof of an injury that has just broken the surface. The cut is small; the colour tells the room what has happened. The dream brings the bleeding when something in your life — a careless remark, an accidental exposure, a minor crisis — has produced more visible evidence than the act itself would suggest. A small cut bound up promptly is the dream affirming that the bleeding is being managed. A small cut left bleeding while attention goes elsewhere is the dream noting that a minor injury is being allowed to drain because no one is making time to attend to it.