Bedding is ground zero for bed bugs: sheets, pillowcases, and mattress seams are where you first spot droppings, blood spots, and shed skins. Strip everything, wash hot, and dry on high heat to kill bugs and eggs, then encase the mattress to seal in anything you missed.
Key Takeaways
- Bedding shows the first signs — dark fecal spots, rusty blood smears, and pale shed skins on sheets and seams.
- Heat is the killer, not water — a hot dryer cycle of about 30 minutes kills both bugs and eggs.
- Don’t just wash — washing alone may not finish eggs; the high-heat dry does the lethal work.
- Encase the mattress — a quality encasement traps survivors and makes future checks easier.
What signs show up in your bedding?
Bed bugs leave a paper trail on light-colored bedding. The clearest clue is dark, ink-like fecal spotting, often in small clusters along seams or where the body touches the sheet. You may also see rusty or reddish smears, which are crushed bugs or blood after feeding. Shed skins look like pale, empty bug shells and collect near harborages. Live bugs and tiny, pearly eggs hide in the piping and folds of the mattress and box spring.
Check the usual hotspots: the four corners and seams of the mattress, the box spring, the headboard, and the cracks of the bed frame. The EPA describes the appearance of bugs, eggs, and cast skins, which helps you tell a real infestation from random specks (EPA bed bugs). For a wider inspection routine, see how to check for bed bugs.
How do you remove bed bugs from bedding?
Work methodically. Carefully strip all bedding and bag it at the bed so you do not shake bugs loose across the room. Carry the sealed bag to the laundry rather than dragging loose sheets through the house. Wash on the hottest setting the fabric allows, then dry on high heat for at least 30 minutes. That dryer heat is the part that reliably kills eggs as well as adults, which is why drying matters more than washing.
Items that cannot be washed, like some pillows or stuffed toys, can often still go through a hot dryer cycle. For a deeper look at temperatures and timing, read how to kill bed bugs with your washing machine and dryer. The University of Minnesota Extension confirms that high heat in laundering is an effective control step (UMN Extension).
Why encase the mattress after cleaning?
Cleaning the bedding addresses what is on top, but bugs can hide deep in the mattress and box spring. A bed bug encasement is a zip-up cover that seals the whole mattress, trapping anything inside so it eventually starves and preventing new bugs from moving in. The smooth surface also makes it far easier to spot fecal spots and bugs during future checks.
Leave encasements on for many months, since bed bugs can survive a long time without feeding. Pair the encasement with ongoing monitoring and, if the infestation is established, the broader plan in how to get rid of bed bugs. Choosing a well-made cover matters; see best bed bug mattress covers.
Frequently Asked Questions
Does washing bedding kill bed bugs?
Washing helps, but the high-heat dryer cycle is what reliably kills bugs and their eggs. Hot water can drown and kill some bugs, yet eggs are tougher. Always follow the wash with at least 30 minutes on high heat in the dryer.
Are the black spots on my sheets bed bug droppings?
They often are. Bed bug fecal spots look like small dark or black dots, sometimes smearing if rubbed with a damp cloth because they are digested blood. Combined with shed skins or live bugs in the seams, they confirm an infestation.
Should I throw away my mattress?
Usually not. Encasing the mattress traps bugs inside and lets you keep using it, which is cheaper and avoids dragging a contaminated mattress through your home. Discard only if it is badly damaged, and never dump it where someone else might take it.
How soon will I know the bedding treatment worked?
Give it a few weeks of monitoring. Because eggs hatch within about six to ten days, watch for any new bugs appearing after treatment. If a fresh encasement and clean bedding stay spot-free for several weeks, that is a good sign.