Everything You Need to Know About Bed Bugs

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On This Page

• What are bed bugs?
• Signs of infestation
• How they spread
• Health risks
• Why DIY fails
• Heat vs chemical
• After treatment
• Prevention tips

Cimex lectularius are small, flat, oval-shaped parasitic insects that feed exclusively on blood — primarily human blood. They are reddish-brown in colour, approximately 4–5mm long as adults, and thin enough to hide in the smallest cracks and seams.

Despite the name, bed bugs are not confined to beds. They inhabit any warm place close to a sleeping host — sofas, luggage, clothing, picture frames, electrical sockets, and skirting boards.

• Nocturnal feeders — emerge at night, feed for 5–10 minutes, then retreat to hiding spots
• Do not fly or jump — they crawl or hitchhike on luggage, clothing, and furniture
• Not a hygiene issue — found in five-star hotels and clean homes equally; it is a matter of exposure
• Fast breeders — a single female can lay up to 200–500 eggs in her lifetime

Size

4–5mm as adults — roughly the size of an apple seed. Flat when unfed, swollen and red after feeding.

Behaviour

Strictly nocturnal. They feed while you sleep and hide in darkness during the day.

Lifespan

Adults can survive 6–12 months and can live up to a year without feeding under cool conditions.

Reproduction

Eggs hatch in 6–10 days. A small infestation can become severe within 6–8 weeks.

Catching an infestation early dramatically reduces treatment time and cost. Here are the key signs to look for — you do not need to see an actual bug to confirm an infestation.

Bite Clusters

Small, itchy red welts in lines or clusters — often in threes on the arms, neck, face, and shoulders. Reactions vary widely; some people show none at all.

Bloodstains on Bedding

Small rust-coloured spots on pillowcases, sheets, or mattress seams — caused by bugs being crushed after feeding, or blood weeping from bite sites.

Dark Faecal Spots

Tiny black or dark brown spots (~1mm) along mattress seams, bed frames, skirting boards, and behind headboards. They smear when wiped — unlike dirt.

Cast Skins

Bed bugs moult five times during development. Translucent, hollow shells are often found near hiding spots — a clear sign of an active, breeding population.

Eggs

Tiny (1mm), pearl-white and sticky, usually found in groups in cracks and seams near the sleeping area. Very difficult to spot with the naked eye.

Sweet Musty Odour

Large infestations produce a distinctive sweet, musty smell — sometimes compared to almonds or raspberries. An unexplained bedroom odour is worth investigating.

Not sure if you have bed bugs? Call 0121 751 3341 for a free phone consultation. We can help you identify the problem before you commit to anything. Same-day response available across Birmingham and the West Midlands.

Understanding how bed bugs travel helps you protect yourself and avoid reintroduction after treatment. They do not live on the body — they move between locations via objects and surfaces.

• Travel — hotels, hostels, and short-term rentals are high-risk. Bugs move into luggage and clothing and travel home with you.
• Second-hand furniture — buying or accepting used mattresses, sofas, or wardrobes is a significant risk. One pregnant female can start a new infestation.
• Neighbouring properties — in HMOs, flats, and terraced housing, bugs spread through shared walls, electrical conduits, and pipework.
• Visitors — friends or tradespeople can unknowingly carry bugs in clothing if they have an active infestation at home.
• Shared laundry facilities — an underappreciated route. Infested laundry in a shared machine can transfer bugs or eggs to others.

Bed bugs are not known to transmit infectious diseases. However, their presence causes a range of physical and psychological health impacts that should not be underestimated.

Allergic Reactions

Bite reactions range from mild itching to severe welts and swelling. In rare cases, anaphylaxis has been reported in highly sensitised individuals.

Secondary Infection

Scratching bite sites can break the skin and introduce bacteria, potentially causing impetigo, cellulitis, or other skin infections.

Anaemia

In severe, prolonged infestations — particularly affecting the elderly or young children — significant blood loss is possible over time.

Mental Health Impact

Anxiety, hypervigilance, and sleep deprivation from bed bug infestations can be as damaging as the bites themselves. Patients report symptoms consistent with PTSD, depression, and generalised anxiety disorder.

Over-the-counter sprays, mattress encasements, and consumer heat lamps are widely sold as bed bug solutions. In practice, they rarely work. Here is why professional treatment is essential.

01

Chemical Resistance

UK bed bug populations have developed significant resistance to pyrethroid insecticides found in consumer sprays. Products that worked a decade ago are largely ineffective today.

02

Incomplete Egg Kill

Most contact insecticides do not kill eggs. Even if you eliminate every visible adult, eggs hatch in 6–10 days and the cycle restarts — often worse than before.

03

Inaccessible Hiding Spots

Bed bugs hide inside mattress seams, behind skirting boards, inside wall voids, and within electrical fittings. Sprays applied to visible surfaces cannot reach them.

04

Dispersal Effect

Disturbing bed bugs with sprays without killing them can scatter them to new rooms — turning a localised problem into a whole-property infestation.

05

Encasements Alone Insufficient

Encasing a mattress traps bugs already inside it, but does nothing about bugs elsewhere in the room — in furniture, skirting, or walls.

06

Consumer Heat Lamps

Handheld steamers and consumer heat devices cannot sustain the 55–60°C needed throughout an entire room to achieve lethal dwell time at all life stages.

If you have already attempted DIY treatment without success, professional heat treatment is the most reliable next step. Call 0121 751 3341 for a free consultation — no obligation.

There are two primary professional treatment options. Here is an honest, evidence-based comparison to help you understand why we exclusively use heat treatment.

Factor	Heat Treatment	Chemical Treatment
Number of visits required	1 — single visit	2–3 over several weeks
Kills all eggs	Yes — reliably	Unreliably
Chemical residue left behind	None	Yes — on surfaces and furnishings
Resistance risk	None — no heat-resistant bugs	Significant pyrethroid resistance
Penetrates hiding spots	Yes — heat reaches everywhere	Surface-accessible areas only
Safe for pets & children	Yes — immediately after treatment	Re-entry waiting period required
Disruption to property	Minimal — same-day re-entry	Multiple visits over weeks

We exclusively use heat treatment because the evidence for its superiority is clear. Learn more about our heat treatment service

Following a professional heat treatment, these steps minimise the risk of reintroduction and help confirm the infestation has been fully resolved.

1. Wash and Hot-Dry All Bedding

   Do this immediately following treatment. The dryer is your friend — 30 minutes at high heat kills any stragglers in textiles.

2. Vacuum Thoroughly

   Pay attention to mattress seams, skirting boards, and any cracks in furniture. Dispose of the vacuum bag immediately in a sealed plastic bag outside the property.

3. Inspect Luggage Before Re-entering

   If the infestation originated from travel, inspect and treat luggage before bringing it back into the home. Leave it in the car or garage while you check.

4. Avoid Second-Hand Furniture for 60 Days

   Do not bring any used furniture into the property until you have confirmed the infestation is fully resolved — a reintroduction during this period would complicate monitoring.

5. Consider Mattress Encasements

   Not as a treatment, but as a monitoring tool. Encasements trap any surviving bugs on a white surface where they become visible during your regular checks.

6. Monitor for 60 Days

   If you see any signs of renewed activity, contact us immediately. Our 60-day guarantee means we return and re-treat at no additional charge — subject to preparation guidelines having been followed.

Prevention is straightforward once you understand how bed bugs travel. These steps significantly reduce your risk of infestation.

When Travelling

Inspect the mattress seams and bed frame before unpacking. Keep luggage off the floor and away from the bed. When home, unpack on hard floors and wash everything at 60°C immediately.

Buying Second-Hand

Avoid purchasing used mattresses, sofas, or upholstered furniture unless you can verify they are bed bug free. If in doubt, do not bring them inside — the risk is not worth it.

In Flats & HMOs

Seal cracks around skirting boards, behind headboards, and around electrical sockets with decorators’ caulk to reduce routes bed bugs can use to travel between properties.

Regular Inspections

Every few months, check mattress seams, the bed frame, and nearby furniture. Early detection means a smaller infestation and a significantly simpler treatment.

Call for a free telephone assessment — no obligation, no call-out fee. We cover Birmingham and the wider Midlands. Same-day response available.

Related: Our Heat Treatment Services ·  Preparation Checklist ·  Emergency Same-Day Treatment ·  Areas We Cover

Helpful bed bug guides

New to this and not sure where to start? These plain-English guides answer the most common questions:

• How to get rid of bed bugs (complete UK guide)
• How to check for bed bugs, room by room
• Where do bed bugs come from?
• Are bed bugs dangerous?
• How long can bed bugs live without feeding?