Bed Bugs in Mattress: What to Do First

Updated 6 November 2026 · Standard formula, shown below

If you find bed bugs in your mattress, act immediately: isolate the bed, wash and heat-dry all bedding, and vacuum thoroughly before treating with an approved insecticide or heat treatment. This guide covers the exact steps to take, how to identify the infestation, and how to prevent it from spreading.

Confirm It’s Actually Bed Bugs

Before you start treatment, make sure you’re dealing with bed bugs and not fleas, carpet beetles, or dust mites. Adult bed bugs are oval, flat, reddish-brown, about the size of an apple seed (5–7 mm). They hide in seams, tufts, and crevices of the mattress, box spring, and bed frame. Look for:

Rusty or dark spots (fecal matter) on sheets and mattress seams
Tiny pale yellow skins (molted exoskeletons)
Small itchy bites, often in a line or cluster on exposed skin
A sweet, musty odor in severe infestations

If you only see bites but no other signs, check the bed frame and headboard—bed bugs often hide there rather than on the mattress surface.

Immediate Steps to Stop the Spread

Bed bugs are excellent hitchhikers; they can crawl to other rooms or onto your clothes within minutes. Take these steps in order:

Do not move the mattress to another room—this spreads the bugs. Keep it in place until treated.
Strip all bedding (sheets, pillowcases, mattress pad, blankets) and place them directly into a sealed plastic bag.
Wash bedding in hot water (at least 120°F/49°C) and dry on the highest heat setting for at least 30 minutes. Heat kills all life stages.
Vacuum the mattress thoroughly, focusing on seams, tufts, and edges. Use a crevice tool. After vacuuming, seal the vacuum bag in plastic and dispose of it outside immediately.
Encase the mattress and box spring in bed-bug-proof covers. These zippered covers trap any remaining bugs and prevent new ones from entering.

Do not use a bug bomb or fogger—they don’t penetrate mattress seams and can be toxic.

Treatment Options: Heat, Chemicals, or Professional

You have three main approaches, each with pros and cons:

Heat treatment: Bed bugs die at 113°F (45°C) for 90 minutes, or 122°F (50°C) for 20 minutes. Portable steamers (with a 212°F/100°C steam) can kill bugs on contact. Whole-room heat treatment by professionals is the most effective non-chemical option.
Chemical sprays: Look for EPA-registered products labeled for bed bugs, typically containing pyrethrins, pyrethroids, or desiccants like diatomaceous earth. Spray only on mattress seams and crevices, not the sleeping surface, and allow to dry completely before use.
Professional extermination: For moderate to severe infestations, a licensed pest control operator is recommended. They combine heat, steam, and residual insecticides, and often provide a follow-up inspection.

Do not apply rubbing alcohol or bleach—they’re flammable and can damage the mattress.

How to Clean and Protect the Mattress

After vacuuming and treating, you need to make the mattress inhospitable:

Use a stiff brush to scrub mattress seams—this dislodges eggs.
Vacuum again, including the box spring and bed frame.
Encase the mattress and box spring in bed-bug-proof covers. Leave them on for at least 12 months—bed bugs can survive up to a year without feeding.
Keep the bed away from walls and furniture. Place interceptors (small cups with talc) under bed legs to trap any bugs trying to climb up.

Do not throw away the mattress unless it’s severely infested and torn—treatment is usually cheaper than replacement.

Common Mistakes and Misconceptions

Many people make the situation worse by:

Moving to another room—this spreads the infestation to new areas.
Using bug bombs—they don’t reach hiding spots and can scatter bugs further.
Spraying only the top of the mattress—bed bugs hide in seams, under tags, and in the box spring.
Washing bedding in cold water—cold water doesn’t kill bed bugs; heat is required.
Assuming the mattress is the only source—bed bugs often live in the bed frame, headboard, and nearby furniture.

A common misconception is that bed bugs are a sign of poor hygiene. They are not—they’re excellent hitchhikers and can be found in five-star hotels and clean homes alike.

Costs and When to Call a Professional

DIY treatment costs range from $20–$100 for covers, sprays, and interceptors. Professional heat treatment typically costs $200–$1,500 depending on the size of the home and severity. You should call a professional if:

The infestation has spread to multiple rooms
You’ve tried DIY methods for 2–3 weeks without success
You have a large home or multi-unit building
You’re allergic to bites or have respiratory conditions

Even after professional treatment, you’ll need to continue monitoring with interceptors for several weeks.

Preventing Future Infestations

Once you’ve dealt with the current problem, take these steps to avoid recurrence:

Inspect hotel rooms and second-hand furniture before bringing them home.
Use mattress and box spring encasements on all beds.
Reduce clutter around the bed—fewer hiding spots.
Vacuum regularly, especially under the bed and along baseboards.
When traveling, keep luggage on a rack, not the bed, and inspect it before repacking.

Bed bugs are resilient, but with prompt, thorough action, they can be eliminated.

Frequently Asked Questions

Can I just throw away my mattress to get rid of bed bugs?
Throwing away the mattress alone won’t solve the problem because bed bugs are likely in the bed frame, box spring, and nearby furniture. If you do discard it, wrap it in plastic and mark it clearly to prevent someone else from taking it. But treatment is usually more cost-effective than replacement.

Do bed bugs live in the mattress or the bed frame?
Both. While they’re often found in mattress seams and tufts, they prefer tight, dark crevices—so the bed frame, headboard, and box spring are common hiding spots. A thorough inspection should include all of these.

How long do bed bugs survive without a host?
Adult bed bugs can survive 2 to 6 months without feeding, and in cooler conditions up to a year. This is why you must keep encasements on for at least 12 months and continue monitoring.

Can I kill bed bugs with a hair dryer?
A hair dryer may kill individual bugs if held close for several minutes, but it can’t reach the deep crevices where they hide, and it won’t kill eggs. Professional heat treatment or a steam cleaner is far more effective.

Do I need to wash all my clothes?
Only clothes that have been in contact with the bed or floor. Wash them in hot water and dry on high heat. Clothes in sealed drawers or closets are usually fine, but check for bugs before wearing.

Should I sleep in the same bed after treatment?
Yes, after the mattress is dry and encased, you should continue sleeping in the same bed. Leaving the bed empty gives bugs a signal to move to other areas. The encasement and interceptors will trap any remaining bugs.

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.