For extra precaution to make sure these aren’t bedbugs, examine the mattress (especially the piping around the mattress) in strong sunlight or a bright light of some sort. (During the daytime, bedbugs hide in the piping or crevices of mattresses, etc. You may also fine groups of tiny eggs there also.)

Bedbugs look like a tiny tick. They may be as small as the size of a dull pencil point. They may be as large as a very small tick.

Also, look for reddish-black stains on the sheets and mattress. Bedbugs are messy eaters. They also overfeed and tend to deficate near their feeding areas. (Similar to ticks and mosquitoes, bedbugs feed on blood. Unlike ticks, bedbugs retreat to piping or crevices after feeding.)

If you DO discover bedbugs, consult a reputable pest control company. In time, bedbugs will infest EVERY crack and crevice of a room and/or home. Once they are established, it is extremely difficult to rid a home of bedbugs. (It’s common for bedbugs to reside behind light switches, underneath the petals of silk flowers, etc.)

Physical urticaria: Hives caused by direct physical stimulation of the skin — for example, cold, heat, sun exposure, vibration, pressure, sweating, and exercise. The hives usually occur right where the skin was stimulated and rarely appear elsewhere. Most of the hives appear within one hour after exposure.

Dermatographism: Hives that form after firmly stroking or scratching the skin. These hives can also occur along with other forms of urticaria.