Bed bugs are one of the most feared insect infestations, largely because they're notoriously destructive. Couple that with the difficulty of getting rid of them, and it can be downright debilitating for people to wake up itching in the middle of the night. Bed bugs feed on the blood of mammals, and they're generally active at night. They live anywhere, including in furniture, clothing, and carpets. They're shaped like an oval, have a reddish-brown body, and can reach up to 7 millimeters in length. If you're wondering if you've found one, look for a flat bug with no wings Bedbugs generally won't travel from one place to another unless humans or animals carry them. Learn more about these little monsters, and what to do if you find them.