The major goal of this article is to know about bed mites. Bed bugs are obligatory hematologists insects. Most species feed on humans only when other prey is unavailable. They obtain all the additional moisture they need from water vapor in the surrounding air. Bed bugs are attracted to their hosts primarily by carbon dioxide, secondarily by warmth, and also by certain chemicals. Bedbugs prefer exposed skin, preferably the face, neck, and arms of a sleeping person.