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.
The bed bug is a universal problem yet it can be dealt with on a regular basis. used items and new items carry bed bugs. always wash and dry for 20 min. ( its the heat that kills the bug). bed pillows need to be washed and dried on a regular basis and the beds head board are full of body skin cells that attract the bugs. a good old cleaning with vaccum and wipe down is needed. keep your vac cleaned and bag empty after each use, the bugs are in the vac.
Three days after the initial “feeding” the sores hurt really bad. They itch like no other. By the way, none of my roommates have experienced this. I started panicking and washed all my clothes and sheets. I checked every corner of my room. Nothing. I couldn’t find anything, so them things must be hiding pretty well. Unless it isn’t bedbugs. Today I woke up and realized I had three more bites on my arm just above my elbow in the “breakfast, lunch, and dinner” pattern this site talks about.
Cutaneous reactions to bedbug bites can vary widely and are easily confused with other conditions (Table 1).15–19 A typical lesion is a 2- to 20-mm, pruritic, erythematous maculopapule with a central hemorrhagic crust or vesicle.5,8 Macules, papules, wheals (Figure 3), vesicles, bullae, and nodules have all been reported,20 as have asymptomatic lesions with a barely visible punctum as the only evidence of a bite.8 Bites vary in number and are preferentially distributed in unclothed areas (e.g., face, neck, extremities). Unlike many other arthropod and insect bites, bedbug bites are rarely located in the popliteal fossae or axillae.21 Lesions can be noticeable immediately when waking up or several days later, with the reaction often progressing from delayed to immediate with subsequent exposures22–26  (Table 2). The classic bedbug rash is referred to as “breakfast, lunch, and dinner” because it commonly presents as several bites in a row or cluster 20 (Figure 4).
Scratching can cause superinfection, leading to impetigo, cellulitis, or folliculitis.27–32 Reactions typically resolve within one to two weeks without treatment.32 Systemic reactions have been described, including asthma, generalized urticaria, angioedema, iron deficiency anemia, and, very rarely, anaphylaxis.33–36 Although bedbugs have been suspected to be vectors of more than 40 microorganisms, there is no evidence that they are involved in the transmission of disease.5
Recently I went to Dubai, I stayed at my husband’s rental furnished flat. The next morning I was covered with bites. Immediately I knew its big bites but don’t know it’s bed bugs until I google search online a few days. I was so allergic to the bites & can’t stop scratching them. At last I went to a local pharmacy and got this ‘Fenistil Gel’ AKA Dimetindene maleate. it works really well. My bites stop itching, swelling reduced. Some bites I need to applied the gel 1-2 times a day then it stopped bothering me. The only problem now is the marks never go away. :(
Bites on dogs and cats will look much like bites on people, and the pet owner may actually suspect a mosquito or flea bit the pet. As with people, bed bugs do not stay on pets, but return to a protected harborage site after feeding. In addition to bites, the presence of the bug’s feces, cast skins and the animal’s irritation at night are also indicators of bed bugs biting pets. Therefore, one of the best things to do is inspect the pet’s bedding and frequently groom the animal while being vigilant for the telltale signs of bed bug presence.
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