I Found a Bed Bug in My Bed – What Should I Do?

By Richard Collings | 10 March 2026 |

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Discovering a bed bug in your bed can be alarming. Many people first notice them late at night while checking their mattress or after waking up with unexplained bites. If you’ve just spotted one, don’t panic — but it’s important to act quickly.

Bed bugs are small parasitic insects that feed on human blood and typically hide in mattresses, bed frames, furniture, and cracks around the bedroom. According to the NHS, bed bugs can be difficult to eliminate because they hide extremely well and are often resistant to some insecticides.

In this guide, we’ll explain:

What to do immediately if you find a bed bug
How to confirm whether you have an infestation
Steps you can take to prevent the problem from spreading
When to contact professional pest control

If you suspect an infestation, professional solutions such as heat treatment can effectively and quickly remove bed bugs.

Learn more about professional treatment here:
https://www.mothkill.co.uk/bed-bug-heat-treatment/

First: Are You Sure It’s a Bed Bug?

Before taking action, it helps to confirm what you’re looking at.

Bed bugs are:

Small, oval insects
Around 4–7 mm long
Brown or reddish after feeding
Often found around beds and furniture

They are typically active at night and hide during the day in small cracks and seams of fabric.

Common hiding spots include:

Mattress seams
Bed frames and headboards
Behind skirting boards
Sofas and upholstered furniture
Electrical outlets and cracks in walls

Because they are so small and secretive, finding one bug often means more are nearby.

What To Do Immediately If You Find a Bed Bug

If you discover a bed bug in your bed, follow these steps right away.

Don’t Panic

Bed bugs are unpleasant, but they are not known to transmit diseases. Most bites simply cause itchy skin and irritation.

According to UK medical guidance, bites usually improve on their own within about a week and can be treated with antihistamines or mild creams if needed.

Inspect the Bed Area

Carefully check:

Mattress seams
Under the mattress
Bed frame joints
Headboards
Nearby furniture

Signs of bed bugs include:

Small blood spots on sheets
Black spotting (droppings)
Shed skins
Tiny white eggs

Wash Bedding Immediately

Remove bedding and wash at 60°C or higher.

High temperatures help kill bugs and eggs that may be hiding in fabric.

After washing:

Tumble dry on high heat.
Store bedding in sealed bags

Vacuum Thoroughly

Vacuum:

Mattress seams
Bed frames
Carpets around the bed
Upholstered furniture

Seal the vacuum contents in a bag and dispose of it outside.

Reduce Clutter Around the Bed

Bed bugs hide in clutter. Removing unnecessary items around the bed can reduce hiding places.

Signs You Might Have a Bed Bug Infestation

Finding one bug doesn’t always mean you have a full infestation — but it’s a strong warning sign.

Watch for these common indicators.

Bed Bug Bites

Bites often appear as:

Small red marks
Itchy clusters
Lines or zig-zag patterns

They typically appear on exposed skin such as:

Arms
Legs
Neck
Face

However, some people don’t react to bites at all, so a lack of bites does not mean you’re safe.

Black Spots on Bedding

Bed bugs leave dark droppings that look like tiny ink dots on sheets or mattresses.

Bugs in Furniture

Bed bugs can spread beyond the bed.

Check:

Sofas
Curtains
Wardrobes
Carpet edges

They often travel through walls or along pipes in flats and apartments.

What NOT To Do

Many people accidentally make infestations worse.

Avoid these mistakes.

Throwing the mattress outside
Moving furniture to another room
Spraying random insecticides
Sleeping in another room

Moving items can spread bed bugs throughout the property.

DIY Methods That May Help

Some early infestations can be slowed using cleaning and heat.

Common DIY steps include:

Washing bedding at high temperatures
Vacuuming regularly
Steam cleaning mattresses
Using mattress encasements

However, these methods rarely eliminate infestations completely.

The British Pest Control Association and other experts note that professional treatment is often required to remove bed bugs fully.

Why Heat Treatment Is One of the Most Effective Solutions

Professional heat treatment is widely considered one of the most reliable methods for eliminating bed bugs.

During treatment, specialised heaters raise the temperature of the property to levels that bed bugs cannot survive.

Scientific research shows bed bugs die when exposed to temperatures above about 50°C, including their eggs and early stages.

Industrial heat treatments typically maintain temperatures between 50–60°C to ensure all life stages are destroyed.

Heat treatment works because:

Heat penetrates mattresses and furniture
Eggs are destroyed along with adult bugs
The entire room is treated at once
No pesticides are required

This makes it a fast and highly effective option compared to repeated chemical treatments.

You can learn more about professional heat treatment here:
https://www.mothkill.co.uk/bed-bug-heat-treatment/

How Professionals Remove Bed Bugs

Professional pest control companies use specialised equipment and monitoring tools to eliminate infestations.

Typical treatment involves:

Industrial Heaters

Large heaters raise the temperature of the property.

Temperature Sensors

Sensors ensure every area reaches lethal temperatures.

Furniture Preparation

Technicians move furniture to allow heat to circulate.

Treatment Duration

Heat treatments usually last several hours while temperatures are maintained throughout the property.

This ensures that bed bugs hiding deep inside furniture and cracks are destroyed.

How Bed Bugs Enter Homes

Many people wonder how bed bugs appeared in the first place.

The most common causes are:

Travel and hotels
Second-hand furniture
Shared walls in flats
Luggage and clothing

Bed bugs are excellent hitchhikers and can easily travel between homes in bags or furniture.

Preventing Bed Bugs in the Future

Preventative steps can reduce the risk of another infestation.

Inspect hotel rooms when travelling.

Check mattresses and headboards for signs.

Avoid bringing untreated furniture indoors.

Second-hand sofas and beds can carry hidden pests.

Wash travel clothing on return.

High heat can kill bugs that may have travelled home.

Keep bedrooms clutter-free

Less clutter means fewer hiding places.

When To Call Professional Pest Control

You should consider professional help if:

You see multiple bed bugs
Bites continue appearing
Bugs appear in several rooms
DIY cleaning hasn’t worked

The NHS advises contacting pest control services if you suspect an infestation because bed bugs are extremely difficult to remove without professional treatment.

Early treatment can prevent the infestation from spreading further.