You may actually catch a glimpse of a bedbug, but they like the dark and tend to feed in the early hours of the morning. Bedbugs are brown insects, about ¼ inch long, with a flat oval, body.
Bed bug bites can cause a bright red, itchy rash. However, one out of ten people won't react to bed bug bites.
Bedbugs live in your bedframe, and they like to poop there, too. Look for tiny droppings in the bedframe or on your mattress---they'll look like tiny ballpoint pen dots.
A crushed bedbug may leave behind a bloodstain on your sheets or skin.
In heavily infested rooms, bed bugs will leave behind a sweet odor in the room.