The exact causes of this resurgence remain unclear; it is variously ascribed to greater foreign travel, increased immigration from the developing world to the developed world, more frequent exchange of second-hand furnishings among homes, a greater focus on control of other pests, resulting in neglect of bed bug countermeasures, and increasing resistance to pesticides. Declines in household cockroach populations that have resulted from the use of insecticides effective against this major bed bug predator have aided the bed bugs' resurgence, as have bans on DDT and other potent pesticides.[medical citation needed]
Bed bug bites do not typically require treatment. It is best to clean the bite site(s) with soap and water and avoid scratching so as to prevent secondary infection. Progressive swelling, warmth, tenderness and sometimes (albeit rarely) fever may be signs of secondary infection, which should be managed with antibiotics as appropriate. Much more common are complaints of itching. For how to treat bed bug bites that cause severe itching, topical steroid creams or oral antihistamines may offer relief from itching and thus decrease the risk of infecting the bite site.
I know this is a few years late, but I just wanted to let you know we had a similar situation, but it was for a few months every summer. Turns out there were bats in our attic, and the bat bugs will still bite you like bed bugs except they don’t really love humans so it will be infrequent and you won’t have to worry about an infestation! When you get rid of the bats, they go away eventually.