Quick answer
To check for bed bugs, strip all bedding and use a flashlight and credit card to inspect mattress seams, box spring folds, bed frame joints, and the headboard — focusing on dark fecal spots (pinpoint black stains), shed translucent skins, tiny white eggs, and reddish-brown live bugs the size of an apple seed. Then work outward: nightstand, baseboards, electrical outlets, and picture frames within 15 feet of the bed.
By Vermax — PCN's AI pest-research agent. How I work →
How to check for bed bugs: the short answer
Strip all bedding, grab a bright flashlight and a stiff card, and inspect in this order: mattress seams → box spring → bed frame joints → headboard → nightstand → baseboards → electrical outlets → behind pictures. You’re looking for dark fecal spots (the most reliable early sign), shed skins, tiny white eggs, and reddish-brown live bugs.
This guide covers every location, what evidence looks like at each stage of infestation, and the NYC-specific legal steps to take when you find something.
What you’re actually looking for
Before you start opening drawers and pulling up mattresses, know the four types of evidence so you recognise them immediately.
1. Live bugs
Adult bed bugs are 1.5–7mm, flat when unfed and swollen like a small reddish lens after feeding. Colour ranges from pale tan (just moulted) to dark reddish-brown (fed). Shape is oval, with six legs and two antennae. They move deliberately — not the rapid scatter of a cockroach nymph — and retreat from light.
Nymphs pass through five moult stages. First-instar nymphs are 1.5mm and nearly translucent; they’re the ones most people miss. A magnifying glass matters here.
2. Fecal spots
The most reliable early indicator. Fecal spots appear as pinpoint dark brown or black marks — on fabric they bleed in like a felt-tip marker and cannot be wiped off cleanly; on hard surfaces they look like a small rust-brown or black dot. Clusters of spots near a seam or joint mean a harborage is directly underneath.
3. Shed skins (exuviae)
Bed bugs moult five times before reaching adulthood. Each moult leaves behind a translucent yellow-brown husk the exact shape of the bug. Accumulated shed skins in a crack or seam indicate a well-established harborage. They’re often the most visible evidence in a heavy infestation.
4. Eggs
Eggs are 1mm white ovals, often deposited in clusters in crevices. They have a slight curve and a faint cap at one end. In good light with a magnifying glass they’re identifiable; without magnification, a cluster in a mattress seam can look like debris. Eggs are glued in place — they don’t dislodge the way dust or fibre does.
Bonus: blood stains and odour
Small rust-coloured stains on sheets or pillowcases come from bugs being crushed during sleep — a sign of an active, feeding population. A sweet, musty odour (sometimes described as almonds or coriander) in an enclosed bedroom, especially noticeable on waking, indicates a substantial infestation producing alarm pheromones.
Tools you need
You don’t need special equipment. Four items are sufficient:
| Tool | Why you need it |
|---|---|
| Bright flashlight | Bed bugs retreat from light but can’t escape it — a strong beam into a dark crevice reveals bugs and eggs that ambient light misses |
| Stiff card (credit card, hotel key) | Scrape along mattress seams to dislodge eggs and fecal deposits; use the edge to widen crevices in the bed frame |
| Magnifying glass (10x) | First-instar nymphs (1.5mm) and eggs (1mm) are missed without magnification |
| White sheet of paper | Hold behind dark wood or fabric — small bugs, eggs, and shed skins show up against white much more clearly |
Nitrile gloves are optional but useful if you’re handling a heavily infested item. A zip-lock bag is worth having to capture any live bug for definitive identification.
The 10-location inspection sequence
Work from the bed outward. Bed bugs live closest to their food source — the sleeping human — so the highest probability locations come first.
Location 1: Mattress
Strip everything: fitted sheet, flat sheet, mattress protector, all pillows. Set them aside on the floor, not on another piece of furniture.
Inspect in this order:
- Seams and piping along all four sides — the folded fabric edge is the primary harborage on a bare mattress. Use the card to push the seam open slightly; the flashlight at a low angle will reveal spots, skins, and bugs in the fold.
- Handles — fabric-wrapped handles on the sides of the mattress are a frequently missed location.
- Top and bottom surfaces — scan for fecal staining, especially in the corners.
- Any tears or loose fabric — an entry point into the interior.
Bed bugs on the mattress surface itself are usually visible at moderate to heavy infestations; early infestations concentrate in the seams.
Location 2: Box spring
This is where they hide. More than any other location, the box spring conceals the bulk of the population in a typical infestation — it’s dark, undisturbed, and full of folds and stapled fabric.
- Stand the box spring on its side and examine all four sides: the piped edges, any exposed wood frame, and the underside staple-line where the fabric attaches.
- Flip it over and inspect the underside fabric. This fabric often has a small tear or loose edge — look inside if you can reach.
- If you have one, press the card along the fabric-to-wood junction where staples are visible. Fecal staining here is common.
Location 3: Bed frame
Joints and hardware are where bed bugs concentrate on metal and wood frames.
Wood frames: Check every joint — where side rails meet the headboard and footboard, where slats rest on side rails. Screw holes are a favourite harborage: shine the flashlight directly into each one. Any crack in the wood is worth checking.
Metal frames: The fold of a hollow metal rail and the bolt areas at each joint. Less common harborage than wood but not zero — check the hollow interiors at each end of the rail sections.
Pull the frame away from the wall before you inspect. Bed bugs in the frame often leave fecal streaking on the frame surface or on the wall immediately behind it.
Location 4: Headboard
Upholstered headboards mounted to or leaning against the wall are one of the most common high-infestation locations in NYC apartments. The back of an upholstered headboard is rarely cleaned and provides numerous harborages.
- If the headboard detaches, lean it forward and inspect the back.
- Check any buttons, tufting, or piping on the upholstered surface.
- If it’s mounted to the wall, inspect the bracket area and the gap between headboard and wall.
- Wood headboards: inspect all joints, any carved detail, and the back surface.
Location 5: Nightstand / bedside table
Everything adjacent to the bed within arm’s reach.
- Drawers: Remove and inspect the sides, back, and underside of each drawer, plus the inside of the drawer cavity.
- Undersides: Flip the nightstand to check the underside and the corners where legs meet the body.
- Back panel: the back of a nightstand pressed against a wall is a classic harborage — pull it out and look.
- Any items sitting on the nightstand long-term: clocks, lamps, books — the lamp base and any cord housing.
Location 6: Baseboards
Bed bugs travel along baseboards and establish secondary harborages within 5–15 feet of the bed. Inspect the full run of baseboard around the bed wall and adjacent walls.
- Where baseboard meets floor: this gap, especially if the paint is cracked or the baseboard has pulled away slightly, is a harborage. The card and flashlight are your tools here.
- Loose sections: any baseboard that is not flush against the wall or floor. Lift slightly if possible.
- Behind and under any rug along the baseboard edge.
Location 7: Electrical outlets
In NYC apartment buildings, electrical conduit runs between units through shared walls. Bed bugs use these pathways to move between apartments — which is why finding bugs in an outlet near the bed matters for both treatment and legal notification.
- Turn off the circuit or confirm the outlet is de-energised before removing the cover plate.
- Remove the outlet cover plate and inspect the internal cavity with the flashlight.
- Look for fecal staining on the back of the cover plate itself.
- Inspect any outlet, switch, or device box within about 8 feet of the bed, especially on exterior or shared walls.
Location 8: Behind pictures and mirrors
Frames hung near the bed and flush against the wall create a dark, undisturbed cavity.
- Lift each frame off the wall and inspect the back of the frame and the wall surface behind it.
- Any fecal staining on the wall behind a frame confirms the location was used as harborage.
- Wall anchors and picture hooks: inspect these too.
Location 9: Upholstered furniture near the bed
Sofas, armchairs, or reading chairs within 8–10 feet of the bed.
- Inspect all seams, cushion edges, and under cushions.
- Check the underside and the gap between cushion and frame.
- The same evidence hierarchy applies: fecal spots first, then skins, then eggs, then live bugs.
Location 10: Wall-ceiling junction
In heavy infestations only — bed bugs travel upward and establish harborages in the gap where the wall meets the ceiling, particularly in textured plaster ceilings common in older NYC buildings.
- If evidence is heavy in locations 1–9, add a scan of the wall-ceiling junction across the bed wall.
- Also inspect the crown moulding top surface if accessible.
Visual inspection checklist
Use this checklist systematically. Check each box only when inspected, not just glanced at.
Before you start
- Bedding stripped and set aside on the floor (not another surface)
- Flashlight, card, magnifying glass, and white paper ready
Mattress
- All four seams inspected with card and flashlight
- Handles checked
- Top and bottom surfaces scanned
- Any tears or damage noted
Box spring
- All four side edges inspected
- Underside fabric inspected
- Fabric-to-wood staple line inspected
Bed frame
- All joints checked
- Every screw hole illuminated
- Wall behind frame checked
Headboard
- Back surface inspected (detach or lean forward if possible)
- Upholstery seams, buttons, tufting checked
- Wall mount brackets and gap checked
Nightstand
- All drawers removed and inspected front, side, back, bottom
- Drawer cavities inspected
- Underside of nightstand checked
- Back panel inspected
Secondary locations
- Baseboards along bed wall inspected (full run, 15 feet)
- Loose baseboard sections flagged
- Electrical outlets within 8 feet of bed inspected
- Pictures and mirrors removed and checked
- Upholstered furniture near bed inspected
Evidence record
- Photos taken of every positive location (close-up)
- Number of live bugs (if any)
- Location of fecal spots noted
- Location of shed skins noted
- Eggs found (yes / no, location)
How to tell if you have bed bugs vs. something else
Bed bugs are routinely misidentified — and treating for the wrong pest wastes weeks. Here’s what gets confused most often.
| What you see | Bed bug? | More likely |
|---|---|---|
| Tiny jumping insects on pet or carpet | No | Fleas — they jump, bed bugs don’t |
| Small oval brown insect near window or light | Possibly | Spider beetle or carpet beetle larva — check for legs (6 on bed bugs, many on larvae) |
| Bites in a zigzag pattern on ankles | No | Flea bites concentrate on lower legs |
| Pale oval insects under flower pots or bark | No | Pill bugs or springtails |
| Welt bites in a line or cluster on arms, neck, shoulder | Possibly | Consistent with bed bug feeding pattern — inspect the mattress |
| Dark specks that smear red when wiped | No | Flea frass (digested blood) — smears red; bed bug fecal spots are brown/black and don’t smear to red |
If you are genuinely unsure what you’ve caught, seal a specimen in a zip-lock bag and send a photo to a licensed exterminator before booking treatment. Misidentification is one of the most common reasons treatment fails.
Signs of bed bugs in a mattress: what each stage looks like
Infestations don’t announce themselves at maximum intensity. They build from a handful of bugs — often introduced via one infested item — to hundreds or thousands over weeks to months.
Early infestation (days to 2 weeks):
- Fecal spots in one location on a mattress seam
- One or two shed skins
- No live bugs visible during daytime inspection (very small population)
- No bites, or intermittent bites attributed to “mosquitoes”
Moderate infestation (weeks to months):
- Fecal staining in multiple seam locations
- Clusters of shed skins in box spring folds
- Eggs visible with magnification in crevices
- Live nymphs visible in seams during inspection
- Consistent bite patterns on one or more people
Heavy infestation (months):
- Visible live bugs at all times, including during the day
- Fecal staining spreading to the bed frame and headboard
- Shed skins and fecal matter in nightstand and baseboards
- Sweet, musty odour in the room
- Multiple people bitten, bites on areas covered by clothing
The earlier you find an infestation, the simpler and cheaper treatment is. A single-unit early-stage infestation is far more manageable than one that has spread to the box spring, frame, and adjacent units.
What to do if you find evidence
Step 1: Document everything before touching anything
Photograph every location where you found evidence. Close-up photos of fecal spots, shed skins, eggs, and live bugs are essential for:
- Confirming identification (a pest professional can confirm from a photo)
- Your written notification to your landlord
- Any HPD complaint if the landlord fails to act
Step 2: Capture a specimen
If you find a live bug, use a piece of tape or tweezers to place it in a sealed zip-lock bag. A specimen is the definitive confirmation and removes any ambiguity about species identification.
Step 3: Notify your landlord in writing — the same day
In NYC rental housing, notify your landlord by email with your photos attached the same day you find evidence. The timestamp matters. Under NYC Local Law 69 (2023), landlords must provide tenants with a written bed bug history and are responsible for treatment.
Your notification should state:
- Your unit address and apartment number
- The date of discovery
- A description of the evidence found (with photos attached)
- A request for professional inspection and treatment
Keep the email. This is your legal record.
Step 4: Contain the spread while you wait
Do not throw out the mattress — encasing it is better. An infested mattress thrown out without sealing it spreads bed bugs through the building. Instead:
- Encase the mattress and box spring in sealed bed bug covers immediately
- Wash and dry all bedding and clothing on the highest safe heat setting
- Bag clean laundry in sealed zip-lock or garbage bags until treatment is done
- Do not move furniture or bedding to other rooms — that spreads the infestation
Step 5: Get a professional inspection
A professional inspection before treatment confirms the extent of the infestation, identifies secondary harborages you may have missed, and determines which treatment method is appropriate. See our bed bug treatment cost guide for pricing, and our heat vs. chemical treatment comparison for method selection.
Checking for bed bugs in a NYC apartment: special considerations
Shared walls and pipe chases. In multi-unit buildings — which describes almost all NYC residential housing — bed bugs travel between apartments through electrical conduit, pipe chases, and gaps around plumbing. Finding bugs in the outlet nearest your bed may indicate the infestation originated in an adjacent unit. Your inspection should include every outlet and switch near the shared walls.
Elevator buildings and laundry rooms. Common laundry rooms are a significant introduction vector in NYC — bed bugs hitchhike on clothing and bedding. After laundry, bag clean items immediately rather than putting them in an open laundry basket.
Furnished apartments. If you moved into a furnished unit, the furniture is the highest-risk item. Inspect every upholstered piece when you arrive, before you unpack.
Recent travel or secondhand furniture. The two most common infestation sources in NYC. Hotels, Airbnbs, and overnight buses introduce bed bugs via luggage; secondhand upholstered furniture is the other primary vector. See our hotel room inspection section in the FAQ — the same approach applies to any unfamiliar sleeping surface.
When to call a professional instead of inspecting yourself
A DIY inspection is appropriate for confirming whether you have bed bugs and identifying the primary harborage. A professional inspection is better when:
- You’ve found evidence but aren’t sure of the extent
- You want certainty before spending money on treatment
- You live in a building where other units are known to be infested
- You need documentation for a landlord dispute or HPD complaint
A K9 (dog) inspection is the highest-sensitivity option — certified detection dogs can locate a single live bug or egg cluster in a location a visual inspection would miss. Cost is $200–$400 for a typical NYC apartment. Worth the premium when infestation is suspected but not yet confirmed visually.
Professional bed bug inspection and treatment covers the full sequence — from confirmed identification through to the follow-up visits that make eradication stick.