The mechanism of skin injury by arthropods depends on the structure of the mouthparts. These insects are categorized as vessel feeders if they insert the tip into a capillary or as pool feeders if they feed on the extravasated blood from damaged tissue. They often inject different pharmacologically active substances (eg, hyaluronidase, proteases, kinins), which may cause different skin reactions (eg, erythema, wheal, vesicle, hemorrhagic nodule). See the following images.
The bed bug (Cimex lectularius) has been a parasite of humans throughout written history. Its adaptation to humans is so complete that its bite is not noticed until well after the bug leaves its victim, if it is noticed at all. Attracted by the warmth of our bodies and the carbon dioxide we exhale, bed bugs emerge usually at night from hiding places, seeking human blood. While pathogens have been found in bed bugs, the bed bug apparently does not transmit diseases to humans.
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Caregivers, firefighters, and other service providers are sometimes required to enter and work in bed bug-infested dwellings. In doing so, there is the potential to transport some bugs home or to the workplace. It should be noted that bed bugs do not fly, nor jump onto people/pets as fleas do. During the day, bed bugs usually remain hidden and immobile, becoming more active at night when seeking a host. Consequently, the chance of picking up bed bugs by merely walking into an infested dwelling during the day is unlikely. The risk may increase while providing care but can be lessened by taking some precautions. 
Units that produce “dry” steam are less likely to damage household goods. Steam must be at least 113 degrees Fahrenheit (F), the minimum temperature to kill bed bugs, and care must be taken to reduce pressure so that bed bugs are not literally “blown away” before they can be killed by the steam. Steaming should be avoided around hazards such as electrical outlets.

Although bedbugs are generally nocturnal, they're like humans—if they're hungry, they'll get up and get something to eat. "If you go away to visit a friend for a week and you come back and sit down on the couch, even though it's daytime the bedbugs will come looking for you," Schal says. Keeping a light on, then, unfortunately does not keep these tiny vampires away.
Occasionally, you might find other bugs which resemble the common bed bug including the bat bug and swallow bug. Both of these species superficially resemble the common bed bug. However, their primary hosts are bats and birds and there are small but diagnostic morphological differences. Problem infestations with these bugs may occur in attics or unused chimneys. Typically, when one host is gone these bugs seek an alternative host blood meal. This is when humans are bitten. It is important to differentiate between the common bed bug and other bugs that feed on bats and birds because control efforts can be targeted at the wrong sites and infestations can continue.
It's possible that your son is just the only one showing a reaction to them - or the bedbugs are in his room somewhere. Thoroughly examine the bedding, mattress, under the bed, and the room in general. Usually it's best to call an exterminator to completely get rid of bed bugs. As for where they came from in the first place, there's usually numerous ways for bugs to get into a house or apartment - cracks, open doors/windows, unknowingly bringing into the home something with bedbugs, etc.
Probably chiggers -- they are very small, red mites that usually cannot be seen with the naked eye. They are about as small as the period at the end of this sentence. To stop the itching, use OraJel (usually sold for teething babies), which contains benzocaine (an anesthetic). Also, rub in hydrocortisone cream. To prevent chigger bites, wear long pants and stuff the cuffs into your socks.
Dusts have been used to ward off insects from grain storage for centuries, including plant ash, lime, dolomite, certain types of soil, and diatomaceous earth or Kieselguhr.[60] Of these, diatomaceous earth in particular has seen a revival as a nontoxic (when in amorphous form) residual pesticide for bed bug abatement. While diatomaceous earth performed poorly, silica gel may be effective.[61][62]
A hair dryer might seem like a safer way to kill bed bugs with heat. Unfortunately, their maximum temperature is rarely more than 150 degrees. That heat level can kill bed bugs, but only if you maintain the heat over them for several minutes. So unless you want to follow each bug you see around with a hair dryer until they eventually die, you’d probably be better off just hitting them with the thing.
Apply as a coarse, low-pressure spray to harborage areas including crevices, baseboards, loose plaster, behind bed frames and headboards, beneath beds and furniture, and to bedsprings and bed frames. After removal of bed linens, apply Transport Mikron to mattress and boxsprings. Apply to tufts, edges, seams and folds (do not spray clothes or bed linens). Your may apply it to furniture, but not to areas where there is direct access to seating or arm placements. Infested bed linens should not be treated, but should be removed, placed in sealed plastic bags, and taken for laundering and drying at high temperatures.
Use precautions in your own home. Keep the plastic covering that comes on your mattress when purchased new. Purchase special bedbug covers for you mattress and box spring. Make sure that they are quality ones with heavy duty zippers and constructed with special fabric that doesn't rip easily. Don't buy the cheap versions which are not thick enough to prevent the bedbugs from sticking their feeding tubes into the skin through the cover.[19]
These nocturnal creatures can hide in beds, floors, furniture, wood, and paper trash during the day. We humans usually become their dinner during the night, with peak biting activity just before dawn.They can obtain their meal in as little as three minutes, after which they are engorged and drop off the host, then crawl into a hiding place to digest their meal. Bedbugs can live for 10 months, and can go weeks without feeding.
Bed bugs are tiny, flat, wingless insects that range in color from nearly white to deep brown/reddish. The parasitic pests get their name from their hiding spot of choice – they prefer burrowing into bed frames and mattresses during the day, then become active at night when they feed on people and pets. Bed bugs are resilient pests that can hitch a ride on luggage, furniture, storage boxes, backpacks and clothing (but rarely humans), very quickly causing an infestation.
Apply as a coarse, low-pressure spray to harborage areas including crevices, baseboards, loose plaster, behind bed frames and headboards, beneath beds and furniture, and to bedsprings and bed frames. After removal of bed linens, apply Transport Mikron to mattress and boxsprings. Apply to tufts, edges, seams and folds (do not spray clothes or bed linens). Your may apply it to furniture, but not to areas where there is direct access to seating or arm placements. Infested bed linens should not be treated, but should be removed, placed in sealed plastic bags, and taken for laundering and drying at high temperatures.

Bed bugs occur around the world.[36] Before the 1950s about 30% of houses in the United States had bedbugs.[2] Rates of infestations in developed countries, while decreasing from the 1930s to the 1980s, have increased dramatically since the 1980s.[3][4][36] Before the 1980s they were common in the developing world but rare in the developed world.[4] The increase in the developed world may have been caused by increased international travel, resistance to insecticides, and the use of new pest-control methods that do not affect bed bugs.[37]
While alcohol can kill bed bugs on contact, it’s not going to kill nearly enough of bed bugs to be considered effective. In lab studies, even 99 percent concentrations of alcohol only killed between 40% to 60% of the adults that were sprayed. On top of that, alcohol has no long-lasting residual effect, and doesn’t affect bed bug eggs. 60% sounds good, but a contact killer should be able to kill a lot closer to 100% of the bed bugs you see. Otherwise, a shoe or a blowtorch would be the more reliable tool for the job. (Editor’s note: please don’t use a blowtorch.)
Thanks to pesticide resistance, those cans of spray at your local hardware store simply will not do, Schal says, adding: "Relying strictly on chemicals is generally not a good solution." The most effective solutions are fumigation and heat treatments, but these can cost a cool $2,000 to $3,000 apiece for a single-family home. Scientists are diligently pursuing other strategies, including freezing and bait similar to that used for cockroaches. In the October 2010 issue of the Journal of Economic Entomology Schal and colleagues at the U.S. Department of Agriculture published a technique that employs inexpensive infrared and vibration sensors to track bedbug movement, which could be applied to the development of automated traps that detect the pests.

Bed bugs have five immature nymph life stages and a final sexually mature adult stage.[13] They shed their skins through ecdysis at each stage, discarding their outer exoskeleton.[14] Newly hatched nymphs are translucent, lighter in color, and become browner as they moult and reach maturity. Bed bugs may be mistaken for other insects, such as booklice, small cockroaches, or carpet beetles; however, when warm and active, their movements are more ant-like, and like most other true bugs, they emit a characteristic disagreeable odor when crushed.
"We originally thought the bedbugs might prefer red because blood is red and that's what they feed on," study co-author Corraine McNeill, an assistant professor of biology at Union College in Lincoln, Nebraska, said in a statement. "However, after doing the study, the main reason we think they preferred red colors is because bedbugs themselves appear red, so they go to these harborages because they want to be with other bedbugs, as they are known to exist in aggregations."
Bedbugs are parasitic arthropods from the family Cimicidae. They are typically less than 1 cm in length and reddish brown in color. Bedbugs can be found in furniture, floorboards, peeling paint, or other small spaces, most commonly in areas of clutter. These insects come out at night in search of prey upon which to feed, with peak feeding times just before dawn. Bedbugs are typically attracted to body heat, carbon dioxide, vibration, sweat, and odor. The image of a Cimex lectularius is shown courtesy of the US Centers for Disease Control and Prevention (CDC).

They also have the ability to travel beyond the bedroom, so all adjoining rooms should be checked for infestation. Any area that offers a layer of protection, e.g. dark, isolated areas, should be checked. They do leave excrement droppings behind, so even if they are not seen, you can often see where they have been. The best method to find them is to check only at night, and with a red light.

To prevent bringing bed bugs to one's own home, travelers are advised to take precautions after visiting an infested site: generally, these include checking shoes on leaving the site, changing clothes in a garage before returning to their home, and putting the used clothes in a clothes dryer outside the house. When visiting a new lodging, it is advised to check the bed before taking suitcases into the sleeping area and putting the suitcase on a raised stand to make bedbugs less able to crawl in. "An extreme measure would be putting the suitcase in the tub." Clothes should be hung up or left in the suitcase, and never left on the floor.[29] The founder of a company dedicated to bedbug extermination said that 5% of hotel rooms he books into were infested. He advised people never to sit down on public transport; check office chairs, plane seats and hotel mattresses, and monitor and vacuum home beds once a month.[30]
you have to get the heat treatment on your house & wash & dry EVERYTHING you own in a very hot dryer some there maybe some help to pay for it if you own your home w a no interest loan or if you rent you better tell your landlord he needs to treat his whole property & i bet he wont be happy its very expensive my moms apt bldg gets a dog checking every unit & its $850 for her tiny one bedroom..i just read a house can be $1500 to $2000 theres a hair treatment too its a very hot comb that costs about $150 a person..you cant be going to peoples homes anywhere you go youre spreading the joy
Avoiding bed bugs is most challenging in hotels, apartment buildings, and other places where there are many people, high turnover and ongoing opportunities for introduction of the pests. Periodic, preventive inspection by tenants, housekeeping/maintenance staff, or pest control firms is the best way to detect infestations in their initial stages when they are easiest to control. Visual inspections can be supplemented by using various monitoring devices to capture and reveal bed bugs that may have been overlooked by occupants.   

Everything you need to know about fleabites Fleas reproduce quickly and can live in fabrics and carpets. Their bites are itchy and painful, and they can transfer disease to humans. Fleabites tend to be very small, with central red spots, and they often appear in clusters. Here, learn to identify fleabites, treat them, and rid the home of these pesky parasites. Read now

Dismantling bed frames in infested areas typically exposes bed bug hiding sites. Having access to these areas during cleaning is important. Stand up the box spring and shine a flashlight through the gauze fabric and look for bed bugs. If the fabric is torn (possible hiding place), remove fabric to prepare for spraying. If the mattress and or box springs are infested, you may want to consider Encasements by Mattress Safe. Once covered with these encasements, bed bugs can not enter or exit. There is no need to treat the mattress or box spring when using these encasements. Keep them on for a year.
Some oils like tea tree and neem oil can't kill bedbugs, but they work well to repel them. Tea tree oil is an extract from the Melaleuca alternifolia plant—it can cause various health problems with pet birds, cats, and small dogs. If there are pets in the house, look for other safer choices. If you use the oil, apply it in small quantities to the skin to repel bed bugs. Since bed bugs are active at night, apply it before bedtime.
I paid $1200 for extermination heat treatment- lasted a few months and they are back- bought all new furniture! Still bugs- spray bye bye bugs spray which kills on contact but didn’t stop the infestation! This is going on 2 years now!!!! Mainly they are just in the 2 bedrooms. Ours and one that hardly no one sleeps in. But when grandkids come- they get bitten bad- I scrub, spray, vacuum & steam clean, & wash all bedding n still bit!!! Ready to burn the house down!!! HELP!!!!!! Can’t afford another $1200
Treatment for bedbug bites is typically supportive. Local antiseptic lotions or antibiotic creams can be applied for secondary infections, whereas corticosteroid creams and oral antihistamines can be used for allergic reactions. Bedbugs can be eliminated through the use of permethrin insecticides, baited traps, special bedbug-free beds, and bed nets. Homemade methods, such as wrapping duct tape around bed legs as shown, may be effective, but bedbugs have been known to climb other objects and then fall down onto a bed. Image courtesy of Wikimedia Commons.

"Bedbugs are terribly nondiscriminatory," Schal says. Bedbugs can be found anywhere from ritzy high-rises to homeless shelters. The prevalence of the bugs in low-income housing is therefore not a result of the insect's preference, but of dense populations and the lack of money to pay for proper elimination strategies. "Any location is vulnerable," Kells says. "But some people are going to have a harder time getting control of them because it is such an expensive treatment."
According to textile experts (Drycleaning & Laundry Institute, Laurel, MD), most garments designated as ‘dry-clean only’ (e.g., cotton, wool, silk, linen, rayon, nylon) will not be harmed provided they are dry before being placed in a clothes dryer at a moderate temperature setting. Dry cleaning procedures also kill bed bugs, but there is a risk of infesting the establishment when buggy items are tagged and sorted. 

Stripping and vacuuming the mattresses and box springs, and encasing them.  Double bag your bedding and wash in hot water and dry for at least 30 minutes (discard the inner bag after putting bedding into the washer, as it could have bed bugs).  After vacuuming suspected bed bugs from the bed, take your vacuum cleaner outdoors and remove and discard the bag.  Purchase a good quality set of bed-bug-proof encasements for your mattresses and box springs. Bed bug-proof encasements are fabric sacks into which you slide your mattress or your box spring. The zippers on bed bug encasements are designed to be tight enough to prevent even the smallest life stages of the bed bugs from escaping. Also, good bed bug-proof encasements are woven to prevent bed bugs from biting you through the encasement. A good encasement will trap all bed bugs in the mattress and box spring inside, and will be smooth on the outside, providing few places for bed bugs to hide. Sears, Target, Walmart and other stores may sell bed bug-proof encasements, but these can also be purchased online. A good place to look for different brands and reviews of mattress encasements is Amazon.com (whether you buy there or at a local store). Go to http://www.amazon.com and search for “bed bug mattress protectors”.

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