What do bed bugs look like?

Small, Flat, & Shades of Brown

If you’re wondering what bed bugs look like, they are actually very difficult to spot, especially if they are young. Adult and large nymphs are small, flat, oval-shaped and medium brown. Adult bedbugs can grow up to 7 mm in length, while babies can be as small as 1.5 mm. Adult bedbugs are reddish brown in color, appearing more red after feeding, while young bed bugs are clear in color and become bright red after eating.

bed bug profile
Expert Tip

As you look for bed bugs or signs of them, your most important tool is a very bright flashlight. These bugs are tiny, so check in dimly lit cracks, crevices, mattress seams, and other dark holes or nooks where they like to hide.