Have you been the unfortunate victim of a bed bug infestation? It usually starts with someone in your house waking up with a rash all over their face, neck, or back. This rash doesn't happen to everyone, and it doesn't happen all the time. It is a reaction to the anticoagulant that bed bugs use to thin your blood, so they can suck it out without alerting you to their presence. It works so well, that these bugs can feed on you multiple times a night, even on sensitive areas like your face and neck. It is when several bites happen all in one area that victims become aware that something bad is happening.