The answer to 'what attracts bed bug' is that bed bugs are attracted to warmth, carbon dioxide, and the scent of humans. Bed bugs feed on human blood and will congregate in areas where people sleep or spend a lot of time, such as beds, couches, and chairs. They are also attracted to dirty laundry, clutter, and cracks and crevices where they can hide.
Bed bugs can be difficult to detect at first, as they are small, flat, and good at hiding. Common signs of a bed bug infestation include itchy bites, blood spots on sheets, and the presence of the bugs themselves or their eggs. If you suspect a bed bug problem, it's best to call in a professional pest control technician to properly identify and treat the issue.