But many other things could cause stains like this.
Bed bug trails on sheets.
These small red spots often left in trails are from bed bugs spitting up some of the blood they were drinking or from them being crushed by people rolling over in their sleep.
They live off of the blood in animals and humans.
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The same can be said for plant oil based repellents containing pyrethroids or plant oil.
Stains like the ones in the picture below happen when recently fed bugs get squashed in the bed by a person moving unexpectedly.
They leave streaks on baseboards outlets electronics and upholstered furniture.
On paint there should be staining around the feces and often trails running down the wall.
Heavier stains will need to be pre treated with an enzyme based stain remover and or a peroxide ammonia mixture.
Bed bug feces is pretty much just dried blood.
In fact if you wet it very carefully with a small amount of water it may turn red again and look like blood.
Dryer sheets won t kill bed bugs contrary to what many people believe placing dryer sheets on furniture or in your closets to repel bed bugs simply doesn t work.
The dark splotches on your mattress bedspread and pillows come from the feces of bed bugs that have been feeding on you during the night.
Bedbugs tend to live and migrate towards mattresses box springs bed frames and headboards.
When bed bugs are infesting a wall outlet you may see streaks on the outlet cover or streaks on baseboards.
Look around the edges of your mattress the creases of your sheets and pillowcases.
You ll often find feces in mattress seams and other cracks and crevices.
You see black feces bed bugs leave their feces everywhere.
These streaks will also be noticeable on sheets and pillowcases if bed bugs are coming to feed at night.
Bed bugs will leave a blackish looking trail of fecal specks on your mattress or bedding.
These are small brownish red insects that are oval in shape.
But these signs of an infestation won t always be found on bedding because bed bugs are highly mobile and move fast.
Smears of blood on sheets are one of the early warning signs that bed bugs might be sharing your bed.
They leave streaks on pillowcases sheets and bedding.
Blood stains resulting from a bed bug bite are often visible on lighter colored sheets and pillow cases.
The stains are typically dark or rusty spots of excrement.
Unexplained blood stains on bedding.