About Bed Bugs
Bed bugs are tiny, wingless, parasitic insects that feed exclusively on blood. They are mainly active at night but are not exclusively nocturnal. They usually feed on their sleeping hosts without being noticed. No bigger than an apple seed, they can live and breed in any and all human environments, usually undetected early on in the infestation.
They spread from infested places by hitchhiking on humans, animals, innate objects, and by crawling between dwellings. Their eggs are sticky and are about the size of a pinhead. Their spread occurs by people unknowingly transporting them home on one’s own person and/or any of one’s belongings: furniture, luggage, handbags, backpacks, clothes, shoes, etc...

In warm conditions, nymphs can feed in intervals of 5 to 10 days ; adults can survive for about 5 months without feeding. Thus, they don’t spend much of their life searching for a host.
When starved, they leave their shelter, search for a host, feed, and return to their shelter. Nymphs can’t survive as long without feeding but can last for weeks without a blood meal. This is the reason why bed bug infestations can be a daunting challenge to eradicate them.
CU! Bug Spray leaves a residue that keeps on killing them slowly as they crawl on it.
History & Resurgence
Bed bugs have been around for over 2,000 years. The first documentation of these pests dates back to about 400 BC in Greece. They have persisted throughout the centuries. Their decreased incidence in the 20th century is credited to newly developed potent pesticides and improved housing conditions. The reasons for their resurgence since the 1980s are debatable. Possible factors for this may be increased human travel, bans on effective but highly toxic pesticides, and their development of resistance to the pesticides.
[For further information visit Wikipedia.com & EPA.gov]