Bed bugs -- creepy, crawly little critters that feast on human blood -- can be difficult to detect, given their propensity for hiding in even the smallest of nooks and crannies. Though the bugs are not known to carry diseases, they can cause an itchy rash on the skin's surface, and they can be easily spread by humans who don't realize they have come into contact with them. In order to determine if your skin rash is a bed-bug bite, there are several signs to look for.
Examine your skin for signs of bed-bug bites in a well-lit room with a mirror, such as a bathroom. You may want to bring a hand-held mirror to assist you for the hard-to-see places, such as the back of your neck. The bites will usually show up on your face, neck, hands and arms.
Look at the color of your rash or apparent bite: A bed-bug bite is typically raised and very red in color; the middle may be darker than the outside of the bite. Sometimes, the middle will have a minute scab.
Note if your rash or bite is feeling itchy; itchiness is one more symptom that your home may be infested with bed bugs.
Take a close look at the arrangement of your bite or bites. Often, bed bugs will leave a trail of bites across the surface of your skin. The bites may be arranged in a line or in a noticeable cluster.