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. 
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.
Don’t forget that in some cases a person does not react to bed bug bites at all. It’s really not that easy to easily identify bed bug bites. Often a diagnosis of spider bite is given when the person really doesn’t know what is causing the lesion(s). Spider bites are often an over diagnosed condition. Also, a hot or warm dryer is much more useful than washing clothes in hot water. Certain studies have shown that some bed bugs will withstand the wash, but not the dryer.
Bed bugs often hide in seams, folds and crevices of mattresses, box springs, bed frames and headboards. A thorough inspection requires dismantling the bed so that upper and lower seams and surfaces can be examined. Things to look for are the bugs themselves, shed skins of the nymphs (immature bed bugs), and the blackish fecal spots. The dark spots of dried bed bug excrement are often present along mattress seams or wherever the bugs have resided. Box springs afford many places for bed bugs to hide, especially along the upper seams and underneath, where the bottom edge of the box rests on the frame. If an underlying dust cover is present, it may have to be removed to gain access for inspection and possible treatment. Successful treatment of mattresses and box springs can be difficult, however, and infested ones may need to be discarded or encased in a protective cover. 
Reactions to bed bug bites differ from person to person from none to a full-blown allergic reaction. A mild reaction may reveal flat, red bumps at the bite sites. A more severe reaction may include an irritating itch (as in my case), or swelling. Resisting the itch is incredibly difficult, but giving in to it can cause severe irritation to the skin, increasing your risk for an infection. It’s the chemicals in the bed bug’s saliva that trigger such reactions, some lasting more than two weeks.

Thank you so much for all the information. I just found a bed bug in my room at 5:00 AM in the morning. I have been getting these red itchy rashes for more than 2weeks . It’s extremely annoying and in spite of looking every where , I couldn’t find anything. These Biggs are so difficult to find. Now after reading this I feel they are even more difficult to eradicate.
Blood spots found on one’s sheets, bites and the presence of bed bug feces and cast skins are some of the indications of a bed bug infestation. Bites are commonly found on the parts of the body that are more likely to be exposed to bed bugs during sleep – the hands, neck, face, shoulders, legs and arms. While not always the case, bed bug bites are often grouped together in a small area and at times may occur in a line or a zigzag pattern. Bites normally look like small, flat or raised areas that may become inflamed, itchy, red or blistered. Bed bug bite reactions don’t always appear immediately after you’re bitten and may take a few days to begin causing symptoms. However, not everyone reacts to bed bug bites in the same manner.
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