Some people have no reaction whatsoever to bed bugs. In addition to not having much of an effect on the elderly, some are just not allergic. Since the irritation and welting appears as the result of an allergic reaction, it is possible to not even know that you were bitten at all. It is entirely possible for several people to live in the same house, and have one person not be affected.
Bedbugs are obligate blood parasites that belong to the insect family Cimicidae. Cimex lectularius and Cimex hemipterus, the two bedbug species that feed primarily on humans, are oval, reddish-brown, flat, and wingless. Adults are typically 4 to 7 mm in length (Figure 1). Nymphs can be as small as 1 mm, and are translucent and lighter in color 5,7 (Figure 2). Adult females produce 200 to 500 eggs in a typical six- to 12-month life span.5,8 Bedbugs can withstand temperatures from 44.6°F to 113°F (7°C to 45°C).8
These blood suckers lock on to the carbon dioxide (CO2) release when sleeping. Once they have you, they head toward a warm part of your body and begin to bite. Two tubes are inserted into your body; one is used to inject a mixture of anticoagulant and anesthetic while the other is used to suck up your blood. You never notice the bites until you wake up and realize you were the main course!
A variety of low-odor sprays, dusts, and aerosol insecticides help with bed bug control. People must apply these pesticides to all areas where the bugs are observed as well as hiding places or spaces where they may crawl. The pest control company can help you determine if an infested mattress can be disinfected or must be discarded. Since beds cannot readily be treated with insecticides, it's often necessary to discard infested mattresses and beds.
Run hot water as hot as you can take it. When its hot enough for you, run the hot water over your bites. Yes it does burn a little, but you’ll feel relief from the hot water drawing the “itch” out. Do this for about 10-15 seconds and then immediately switch to very cold water and run that over it. The shock to your skin from going from hot to cold immediately relieves the itch and it lasts for hours. I can take it pretty hot, so I almost give myself burns, but its worth it.