Bed bugs are attracted to their hosts primarily by carbon dioxide, secondarily by warmth, and also by certain chemicals.[4][16][17][18] Cimex lectularius only feeds every five to seven days, which suggests that it does not spend the majority of its life searching for a host. When a bed bug is starved, it leaves its shelter and searches for a host. It returns to its shelter after successful feeding or if it encounters exposure to light.[19] Cimex lectularius aggregate under all life stages and mating conditions. Bed bugs may choose to aggregate because of predation, resistance to desiccation, and more opportunities to find a mate. Airborne pheromones are responsible for aggregations.[20]

Bed bugs occur in all regions of the globe.[7] Rates of infestations are relatively common, following an increase since the 1990s.[3][4][6] The exact causes of this increase is unclear; with proposals including greater travel, more frequent exchange of second-hand furnishings, a greater focus on control of other pests, and increasing resistance to pesticides.[4] Bed bugs have been known human parasites for thousands of years.[2]


I need some really serious advice. I’m presently staying in a shelter because of abusive situation. It’s only been two days but I am COVERED in bed bug bites. The shelter refuses to move me to another bed because of limited space they said. I have taken oral and topical medications. The thing is it keeps getting worse and worse because every night I have to sleep in the same bed.
Bed bug bites are caused primarily by two species of insects: Cimex lectularius (the common bed bug) and Cimex hemipterus.[3] They are about 1 to 7 mm in size.[7] Spread is by the bugs walking between nearby locations or being carried within personal items.[2] Infestation is rarely due to a lack of hygiene but is more common in high density areas.[8][2] Diagnosis involves both finding the bugs and the occurrence of compatible symptoms.[5] Bed bugs spend much of their time in dark locations like mattress seams or cracks in the wall.[2]

The symptoms of a bedbug bite are usually mild when present, and often individuals will not experience any symptoms at all. Bedbug bites can occur on any exposed part of the body, with the face, neck, arms, and hands being areas commonly affected. The signs and symptoms can appear from minutes to days after the initial bite. Affected individuals will usually complain of localized itching and reddish-colored skin lesions, which may look like a flat welt or a raised bump. Sometimes, the lesions can be found in clusters or in a linear pattern. Typically, these skin lesions will go away after one to two weeks.
In comparison to other insect bites, bed bug bite marks are usually in groups of three or more when they appear on the skin. This is sometimes called the “breakfast, lunch and supper bites”. As you can see in the picture below, the bites are rather close to each other. Their bites often look like little red bumps, pimples or even blisters and welts. Some people can also mistake them for flea bites. If one of these insects bite you, you usually won’t even feel it as it uses a form of anesthetic which dulls the pain. Bed bugs also are known to leave bite marks in a straight line, also in close proximity to each other. A single bed bug can bite you a number of times during the night. However, if you have a bed bug infestation, there are usually a large number of these little pests and this can result in a multitude of bite marks. Please also remember that some people may not have a negative reaction to these bites. In fact, sometimes they are mistaken for spider bites, even by medical professionals so make sure you let your doctor know if you feel it could be a bite from bedbugs. Lastly, you will be happy to learn that bed bugs do not fly so you won’t be attacked from the air.
Check the mattress throughly, paying close attention to seams and tufts along the edges. Flip the mattress over and inspect the bottom carefully as well. Pay particular attention to any rips in the fabric. View the fabric on the bottom of the box spring and shine a flash light to verify that bed bugs have not penetrated the interior of the box spring.
The size of bed bug bites varies with a number of different factors. Bed bugs inject an anti-coagulant along with their saliva when they pierce the skin to take a blood meal. This anti-coagulant is mostly responsible for how a person reacts to the bite and determines the size of the bug’s bite. Since people will have various sensitivities to the bed bug’s bite, the size of the bite will vary, as well. Another factor that influences the size of a bed bug reaction is the number of times a person is bitten. Bite reactions of people bitten many times are also variable, and their response may be either more or less intense as the number of bites increases.
×