Watch for bed bug poop

bed bug eggs
Courtesy National Pest Management Association


“Regardless of the blood source or host,” says Campbell, “once bed bugs digest their blood meal and excrete it, it appears as dark brown or black spots on a surface—very similar to what you would expect an ink stain to look-like if your pen leaked onto your clothing,” says Campbell. You might notice the spots on your sheets, mattress, box springs, or in the cracks and crevices of your headboard, nightstand, or other bedroom furniture. Other “droppings” are tiny blood spots. Sometimes bed bugs “overeat” and they excrete a few drops of blood that will appear as tiny red dots if the fabric or upholstery is a light fabric.