Bed bugs are nocturnal insects that come out at night to feed on their hosts. They are attracted to warmth, carbon dioxide, and the odors given off by their hosts, such as sweat and other bodily scents. Bed bugs typically feed for 5-10 minutes, after which they retreat back to their hiding places until their next meal. Bed bugs are most active at night when their hosts are sleeping, but they can also come out during the day if they are hungry and their hosts are nearby. The presence of bed bugs in a room can be indicated by small blood spots on bed sheets or mattresses, as well as by the bugs themselves or their shed skins. It's important to be vigilant and to inspect your bed and surrounding areas regularly for signs of bed bug activity. Taking steps to prevent bed bugs from entering your home, such as using bed bug-proof encasements for mattresses and box springs, can also help reduce the risk of an infestation.