The bed bug is not an insect with a fixed nest as the ant. However, bed bugs like to colonize the mattress and the room around the bed. You will find the majority of bed bugs in the mattresses, and some of them around, in the room. You will also found them in material slots, floor slots, inside furniture, behind the frames, under carpets, in the objects and electrical outlets. It’s why it’s so important to have a combined approach in the extermination of bed bugs.
Here is a youTube video about where to check to found bed bugs: