So, what do bed bugs look like to the human eye? An apt description is they appear like lentils or apple seeds. Bed bugs have beaks that they use to suck blood from their prey. A bed bug egg is white and averages 1 mm in length. Bugs hide in several places in your room and can even be found in your bed, pillows, sheets, or mattresses. You will find traces of bed bugs by their blood stains. They can often leave traces of blood residue on your sheets, bed, pillows, linens, mattresses, and even the walls of your bedroom. In their hiding places, you can find their shedded skins, egg shells, and faecal matter.