What do bed bugs look like? Bed bugs are small, flat, reddish-brown insects without wings. Roughly the size of Lincoln’s head on a penny, the pests feed on blood to survive, according to the CDC.

Bed bug eggs The bed bug life cycle begins like that of most insects—with an egg. Bed bugs will only romance to fertilize eggs after a blood meal. They meet back up at their harborage (a community of ...

They can grow up to 5mm in size, meaning they're detectable with the naked human eye (when grown). Nymphs (i.e. baby bed bugs) may be difficult to see, as they're typically the size of a pin head.

“Look for the fecal matter, black spotting, look on beds and mattresses, and make sure you know what the bed bugs look like. You see little spots on the baseboards, bed,” said Stuart.