The little black dots found on sheets, mattresses, flooring, etc. are bedbug fecal matter, from the bedbugs digesting blood. They are black from the digestion process of hemoglobin and small because bugs are small.
Bed bug feces contain histamine, a component of their aggregation pheromone. Histamine is released from bed bug fecal matter along with the pheromones released when bed bugs are congregating. This is where the "sweet" odor comes from in a heavily infested area.
While the laundry is taken care of, vacuum thoroughly the mattress, the beds and all the room to get rid of any bugs, feces, eggs, and shells. Go through every small crack, fold, and crevice. Though high-end steam cleaners would work better to exterminate bugs, proven domestic products may also help. A steam mop can help to a huge extent with a
The spots will smear if wiped with a wet rag. Evidence of fecal spotting is usually visible in their typical hideouts, like along mattress seams, box spring edges, and corners. 3. Bed Bug Clusters. Bed bugs are small, oval parasitic insects that are light brown or reddish-brown in color but are hard to spot.
The room and mattress may have once been infested and they have since removed the bed bugs, leaving the black spots indicating bed bug poop behind, either by accident or just missed it. However, if your bed was bought new, and you have only had it in your house, and there is bed bug poop on your mattress, you will more than likely have a bed bug problem on your hands.
If you are finding strange bites, fecal stains around your mattress, or actually see a bed bug, you may want to invest in the best bed bug mattress encasement that you can find. These are also great for relieving allergies from dust mites, not just for bed bugs.