But the bites will look different from person to person, and some people won’t develop any reaction whatsoever. “The same bedbug could bite two different people and one could have no reaction at all and the other can have an extreme reaction with a swollen arm or itchy rash,” says Eric Braun, a board-certified entomologist and business manager for the national pest control company Rentokil Steritech, who is based in Redding, Pennsylvania. Some people end up developing a rash that looks like eczema. (5)
Bed bug bites can look a lot like other insect bites. Some clues that can suggest the presence of bed bugs include finding red, itchy bites upon awakening - especially if the bites line up in a row on the skin. Bed bugs typically bite at night on exposed areas of skin, so the bites are most commonly found on the face, neck, hands and arms. Although some people develop a bite reaction immediately, others may take two to three days before a reaction becomes noticeable, and not all people have obvious bed bug bite symptoms. A bed bug bite can appear as a tiny puncture wound without a surrounding reaction, and can easily be missed. In fact, 30 percent of individuals living in bed bug-infested dwellings report a lack of bites or skin reactions. This appears to be more common amongst the elderly. On the other hand, other people have exuberant reactions, with large, red, raised and itchy welts. This is especially true if one becomes sensitized to bed bug bites, so that with repeated bites there is an increased risk of an exaggerated reaction to bed bug bites.
Bring in only what is needed, and avoid sitting or placing coats and other items on beds, floors and sofas where the bugs commonly reside. Essential items can be placed on a tabletop or other hard surface, preferably away from bedrooms and sleeping areas. Better to sit on a hard (non-upholstered) chair than on sofas and recliners. Also try to avoid leaning or brushing against beds and upholstered furniture. If such items are carried out of infested dwellings (e.g., by sanitation workers or firefighters), it’s best to wrap them in plastic or at least not hold them against your body during transport. Emergency Medical (EMS) personnel may need to take additional precautions, such as removing a patient’s bed bug-infested shoes or clothing, or installing plastic sheeting before transporting them in the emergency vehicle.    
Bed bug infestations are primarily the result of two species of insects from genus Cimex: Cimex lectularius (the common bed bug) and Cimex hemipterus.[3] These insects feed exclusively on blood and may survive a year without eating.[3] Adult Cimex are light brown to reddish-brown, flat, oval, and have no hind wings. The front wings are vestigial and reduced to pad-like structures. Adults grow to 4–5 mm (0.16–0.20 in) long and 1.5–3 mm (0.059–0.118 in) wide.
Just came back from a hotel stay, have one VERY itchy bite on my wrist. I don’t know for sure that it is a bed bug bite butI haven’t unpacked my bags yet, so hopefully everything is safe. Right now I have an aloe and lidocaine gel over the bite, but when I get home I may try soaking it in tea bath. the tannin in black tea can also help with itching and swelling.

Unlike those of other insects, bed bug bites may sometimes appear in tight lines of multiple, small, red marks where multiple bed bugs have fed along an exposed area. Bed bug bites can cause itchiness. Initially, a victim may detect a slight burning sensation. The burning area then develops red bumps, known as papules or wheals (rash). In extreme cases, bites may swell dramatically or turn into blister-like skin inflammations.
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