- Adult bed bugs are brown to reddish-brown, less than 1/4-inch long, broad and nearly as flat as a sheet of paper.
- After feeding, the adults become bloated and dark red.
- Nymphs are very tiny and almost clear.
- Eggs are pearly white, and only 1 mm long, making them very difficult to see with the naked eye.
- Bed bug bites usually look like a row of red welts. They may be itchy or irritating, especially for those who are sensitive or allergic to the bed bug bite. But some people have no reaction to or physical evidence of a bed bug bite.