It is parasitism because the bed bug benefits and the human is harmed
Any type of creature that one regards as a "bug" is an arthropod, and all arthropods have bilateral symmetry. This means they have symmetry across one plane (known as the sagittal plane, and directly down the centre of their body), which means one side of their body approximately mirrors the other side.
In a bed?
bed bug
In Yiddish, "bed bug" is referred to as a "bett-khefer."
Read about how effective bed bug steamers are, other methods of cleaning up your bed, and where to buy a bed bug steamer (among other topics) at www.bedbugger.com.
A wood tick is much larger than a bed bug.
One type of symmetry is rotation. The second type of symmetry is translation. The third type of symmetry is reflection.
NO!
Any type of spray you can use yourself in an attempt to get rid of bedbugs will give you "disappointing" results at best. Though it costs some money, to truly eradicate bedbugs if they have infested your home, is a job for professional exterminators.
BED
I am looking for a treatment for bed bugs. What are the cheapest bed bug treatment options that also work very well?