Carpet beetles are frequently confused for bed bugs. The easiest way to tell them apart is by looking at their larvae: carpet beetle larvae look fuzzier and more stout than bed bug larvae, which look like little worms.
Yes, bed bugs bite in order to feed on their food source: blood! They typically bite at night when their host is at rest. Bites aren’t usually felt, but could cause red, itchy marks on their victims a day or two later.
Compared to other pest problems, bed bugs are relatively harmless. They may be parasitic and leave you with itchy, inflamed bites, but there are no major structural or health dangers of a bed bug problem.