INSPECT THE BED. Strip the mattress and box spring and thoroughly inspect the corners and seams. Use a magnifying glass and a flashlight. You're looking for rust-colored, reddish-brown blood stains and/or small brown ovals (molted bed bug skin).
Bed bugs tend to live in the seams of your mattress, in the box spring, in the folds of loose wall paper, in your sofa, under your rug, and any other area that is close to a feeding source. Bed bugs want to be near where they feed, so expect them to be close by when you sleep if you have them.
Other signs that you have bedbugs include: Blood stains on your sheets or pillowcases; Dark or rusty spots of bedbug excrement on sheets and mattresses, bed clothes, and walls
Prevent, identify, and treat bed bug infestations using EPA's step-by-step guides, based on IPM principles. Find pesticides approved for bed bug control, check out the information clearinghouse, and dispel bed bug myths.
The easiest way to tell if a bed bug has bitten you is to look for small, dot-like bite marks on your skin. These tend to get red a few hours after you are bitten and they can swell up like mosquito bites.
They are, however, good at hiding, so you'll have to look closely. Common places for bed bugs to hide in hotel rooms are in the seams of the mattress (pull up the sheets to look closely), in the cracks of the bed's headboard, in the baseboards, and in the folds of upholstered furniture. Bed bugs will appear as reddish-brown ovals in these places.