Photo Modified: Flickr / hiroo yamagata / CC BY 4.0

You won’t know one has bitten you until you see the rash, which will sometimes not appear until hours after the bite. The annoying bugs leave itchy, red spots on the skin, usually around the arms and shoulders. The good news is that there have been no reported cases of bedbugs transmitting disease to humans. But the blood-sucking insects can cause anxiety and sleeplessness – like in the case of this stomach-churning video of a bedbug infestation in a New York hotel.