Bed Bug Poop: All You Need to Know

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Bed bug droppings can come in various colors, depending on the age and location of the droppings. Bed bug poop: all you need to know. They are typically brown, but they can also be red or black. Bed bug poop is a sign of an infestation, and take it seriously. The droppings can cause damage to mattresses and other furniture, and they can also have some health effects.

Continue to read to find out more about bed bug poops. 

Signs of bed bugs infestation

Bed bug infestations

Bed bugs are notorious for leaving itchy bites on people during the night. If you wake up with unexplained red bumps, you have likely been bitten by bed bugs. Additionally, bed bug droppings are found around the bed frame, mattress, box spring, or headboard.

These droppings are dark brown or black and look like small dots. They are a part of what helps us find them and locate them daily by finding fecal stains on people and sheets. The eggs, nymphs, and adults are visible to the naked eye.

However, shed skins are hard to find because they blend into things such as dust and dirt. In addition, 98% of the time, it is not shed skin but food debris, dust, or dirt.

Bed Bug Poop: All You Need to Know about bed bug fecal matter – Size, Color, Skin, Location

Cimex Lecturalius

Bed bug poop is an important indicator of a bed bug infestation. Here is all you need to know about bed bug feces:

  • Black poop is partially blood that they digest.
  • Size: About 1mm, give or take a little.
  • Shape: Cylindrical and smooth
  • Bed bugs leave fecal matter behind as they move around. The droppings are a light rusty color and will be close to where the bed bugs are feeding.

Bed bug droppings are a clear sign that you have an infestation. They always appear as circular fecal matter and never bleed into the fabric. If it seeps into the fabric, it will make the same crosshair type of lines on the side where it is soaked in.

Bed bug droppings are black and will not flake off. If you see any suspicious marks, smear them with a tissue or cloth to check if they are bed bug feces. However, if the spot is soaked in a sheet or blanket, it cannot be tested.

What does bed bug poop look like?

What does bed bug poop look like?

Bed bug poop is one of the many ways to identify bed bugs. It is typically the size of a spot or a drop of water if spilled.

Multiple tracks are found throughout the mattress. And if feces aren’t absorbed into the fabric, droplets will appear. Black dots of feces on the sides of your mattress can look like mold or polka dots.

Bed bug poop is the most telling sign that you have a bed bug infestation. It looks like black pepper, but it smells like rust or blood.

The smell of coriander or musty linen can also indicate bed bugs. If your sheets were freshly laundered and you still suspect an infestation, bed bugs are present in your home.

What is the smell of bed bug poop or bed bug droppings?

The smell of bed bug poop is often described as rusty or metallic. It is because the droppings are composed of digested blood.

Other smells can be easily overpowered, such as shampoo, soap, or fabric softener. Bed bugs use their harborage to create a strong scent that masks the smell of their droppings.

Bed bug droppings often smell like a wet, moldy odor. However, if you disturb them or their environment, they will scent a more distinct scent. So, if you think you have a bed bug infestation, be sure to check for both the bugs and their droppings.

How big are bed bug blood stains?

Bed bug blood stains are small, dark spots that resemble ink dots. They are typically 2 to 4 times larger than a period at the end of this sentence. Fecal marks come from bed bug droppings, consisting of digested human blood.

How to clean bed bug feces off the bed room wall?

Steam Clean the Fabrics – Bedding

Bed bug poop can be a real nuisance. It is unsightly, but it can also be difficult to remove. You should blot the bed bug poop as soon as possible. And then treat the stain with an enzyme-based fabric stain remover or hydrogen peroxide.

If the bed bug’s poop stains are stubborn, you might have to launder the sheets at 122 degrees Fahrenheit.

Hard surfaces – Bed frame, Box Spring, Headboard

Removing bed bug poop can be difficult, but it is important to take precautions to avoid spreading the bugs.

If you find bed bug poop on a hard surface, wipe it away with a dry clean rag as best as you can. If some residue is left behind or if the stain won’t go after washing, use a commercial wood stain remover.

Does bed bug poop blood smears?

Does bed bug poop blood smears?

Bed bug droppings are often mistaken for blood smears, but they don’t smear. Bed bugs typically leave their droppings near their harborage, usually the mattress.

When they poop, they’ll leave behind black stains that won’t smear. Feces are absorbed if they live on a surface, so this is why you won’t see any smearing.

Inky black balls are bed bug feces. They are small, but the surface will not absorb them. They fall on. They will smear if you rub them, except for dried bed bug poo, which will be solid.

Can you pick up bed bug poop?

Bed bug droppings are more liquid and soft, so picking them up would smear them. They are also small, so you can’t pinch or pick them up. In general, you cannot pick up bed bug poop.

The exception is if they are on a surface that does not absorb them and are left to dry for an extended time. If the area is easy to access, sweep them up with a broom. Non-absorbent surfaces such as wood can also be used to clean the area.

Do bed bugs leave yellow stains or ink stains?

Bed bugs leave several different types of evidence when present in an environment. One such evidence is their feces, which can be either black or yellow. If eggs are scratched, they may leave faint, small yellow stains.

Bed bug skin also changes color as the bug matures; it starts translucent, pale yellow, and crusty but eventually becomes darker and less visible. If not washed soon enough, bed bug feces can also stain the fabric.

Do bed bug stains wash out?

Bed bug stains are a common issue for those who have had an infestation. The good news is that the stains are often removed with a regular wash cycle. However, it is important to pretreat any visible stains before putting the item in the wash.

Bed bug poop will look like tiny, dark rusty dots on the fabric. We recommend using an enzyme-based fabric stain remover if you need to remove these stains.


Bed bugs leave droppings behind after they feed. These droppings are clusters of tiny spots and will be red when fresh. Once they dry, they will no longer be red. In conclusion, you should be on the lookout for dark spots about the size of a dot from a marker.

Check around the edges of your bed first, and then look anywhere else in the infested room that bed bugs may be hiding. Common places to find them include behind the headboard, along walls, behind carpeting, etc.

About the author

A biotechnologist by profession and a passionate pest researcher. I have been one of those people who used to run away from cockroaches and rats due to their pesky features, but then we all get that turn in life when we have to face something.