What kind of insect has infected my house?

does the home have a dehumidifier or running the ac constantly...new laundry soaps or softeners...taking any new medications. If there is a biting bug you can find it other wise it may be environmental conditions that can cause tiny fabric and paper particles to become a skin irritant, if scratched in your sleep looks just like most insect bites...new medications can also give the same sensations.