Why do bed bugs appear? Bed bugs typically appear when they are inadvertently brought into homes or businesses. They are excellent hitchhikers and can easily be picked up from infested areas such as hotels, public transportation, or second-hand furniture. Once inside a home or business, bed bugs quickly find hiding places close to their food source—humans. Cracks in furniture, mattress seams, and behind baseboards are some of their favorite spots. Unlike other pests, bed bugs are not attracted by dirt or uncleanliness; they are solely interested in warmth and blood, making them a problem for anyone, regardless of how clean a space is.