Bedbugs are found all over the world. Bed bug infestations were common in the U.S. before World War II and became rare after widespread use of the insecticide DDT for pest control began in the 1940s and 1950s. They remained prevalent in other areas of the world and, in recent years, have been increasingly observed again in the U.S. Increases in immigration and travel from the developing world as well as restrictions on the use of stronger pesticides may be factors that have led to the relatively recent increase in bedbug infestations. While bedbug infestations are often reported to be found when sanitation conditions are poor or when birds or mammals (particularly bats) are nesting on or near a home, bedbugs can also live and thrive in clean environments. Crowded living quarters also facilitate the spread of bedbug infestations.
Bed bugs are active in summer and winter and are not considered "seasonal" in the same sense that mosquitoes, ticks and stinging insects are. Still, many consider bed bugs to be a greater problem in the warmer months, however it is not the bed bugs that are more active in the summer months - the humans are. In warmer weather we typically travel more, often sleeping in hotels and motels, using various modes of transportation, and thereby increasing our risk of exposure to bed bugs. The bed bugs themselves are year-round pests.
Bed bugs are active in summer and winter and are not considered "seasonal" in the same sense that mosquitoes, ticks and stinging insects are. Still, many consider bed bugs to be a greater problem in the warmer months, however it is not the bed bugs that are more active in the summer months - the humans are. In warmer weather we typically travel more, often sleeping in hotels and motels, using various modes of transportation, and thereby increasing our risk of exposure to bed bugs. The bed bugs themselves are year-round pests.
The biggest problem with these bites is that, depending on the persons skin and their tolerance to bacteria, their appearance is different on different types of people. I have noticed in the past that if I get bitten by a mosquito, I get a rather large red mark (even without scratching), whereas my husbands skin hardly shows any signs of the bite.

One bed bug will usually take more than one bite. Once a bed bug inserts its mouthparts and finds a suitable blood vessel, it will begin feeding. However, finding the right blood vessel may take more than one injection into the skin. In addition, bed bugs are very sensitive to movement by the host they are feeding on. Therefore, if a sleeping person moves, a feeding bed bug will probably withdraw its mouthparts and begin its search for a blood meal on another part of the body. It’s important to remember that the number of bites a person receives is not indicative of the number of bed bugs that feed on that person.
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