When bedbugs bite you, they inject a chemical that acts as an
anesthesia on the area of the bedbug's bites. Chances are you
won't feel a thing while the bedbugs are feasting on your
blood. This explains why you can have multiple, even
hundreds of bedbug bites and not wake up.
People vary in sensitivity to this chemical injected while a
bedbug bites. The amount you suffer from bedbug bites is
unique, depending on your body's reaction to them. Some
people are very allergic to the chemical, and break out in a
rash. The rash (and possibly raised welts that might appear in
each spot you received bedbug bites) may last as long as a
few weeks before completely clearing up. If you are lucky,
you'll only get the raised, itchy welts that disappear in a few
days.
It's important not to scratch the bites. Scratching bedbug bites
can expose your skin to infection, which can in turn lead to
complications like scarring. Treat the bedbug bites with a
topical itch relief cream or oral antihistamine to relieve the
itching. See a doctor for something prescription-strength if
you are having a lot of difficulty.
Bedbug bites and the accompanying rash are not contagious,
although you may get a lot of strange looks from people. (In
fact, victims of bedbug bites report the reaction from friends
and family to their appearance and their subsequent paranoia
about bedbugs is the worst part of the ordeal.) Also, bedbugs
do not spread disease by their bites, as insects like mosquitoes
do. You can rest assured that a bedbug infestation, whether in
your house or in a hotel, is not caused by dirt. Bedbugs can
live in perfectly clean environments, as long as they have a
live host to bite.
SOURCE: http://pharmradiong..com

If u have bedbug in ur home,it's best u fumigate. Check ma signature.