Bed Bugs are small, brownish insects, that are oval in shape. They live on the blood of animals and humans. Bed Bugs do not nest, rather they hide in groups, under mattresses, box springs, and after a long enough infestation, will move to any other crevice in a room they can hide in. Bed Bug bites do not initially hurt, although they cause itchy, red bumps, very similar to Mosquito bites. Finding Bed Bugs is not a sign of dirty a house, as they go where the blood is.