What Do Bed Bugs Look Like? Signs, Bites, Eggs and Treatment
Learn how to identify bed bugs, recognise an infestation and choose the right treatment for your home or business in Kenya.
Bed bugs are small, reddish-brown insects that feed on the blood of humans and other warm-blooded hosts. They hide in mattresses, bed frames, sofas, furniture joints and narrow cracks, usually emerging at night to feed.
Because they can remain concealed for long periods, an infestation may go unnoticed until you begin finding dark spots on bedding, shed skins, live insects or unexplained bites.
Understanding what bed bugs look like, where they hide and how they spread helps you identify an infestation before it becomes more difficult to manage.
What Do Bed Bugs Look Like?
Adult bed bugs are typically about 4–7 millimetres long. They have flat, oval-shaped bodies, six legs and a reddish-brown colour. They do not have functional wings for flight.
Their appearance changes after feeding. An unfed bed bug is usually flatter, while a recently fed insect becomes more swollen and may appear darker or redder.
Young bed bugs, known as nymphs, are smaller and paler than adults. Their small size makes them particularly difficult to spot against light-coloured bedding or furniture.
Common identifying features include:
Adults: Small, oval, flat and reddish-brown.
Nymphs: Smaller, pale or translucent insects that become darker after feeding.
Eggs: Tiny, whitish eggs approximately 1 millimetre long.
Shed skins: Pale outer coverings left behind as bed bugs grow.
Fecal spots: Small dark marks that may appear on mattresses, bed frames and nearby surfaces.
Finding a live bed bug is strong evidence of an infestation. Dark stains, shed skins and eggs can also provide useful evidence when assessed together.
Why Do Bed Bugs Appear?
Bed bugs are attracted to hosts that provide blood meals. They are not specifically attracted to dirt or poor housekeeping, and an infestation can occur in both clean and untidy properties.
They tend to establish themselves near sleeping or resting areas because these locations provide regular access to a host.
Common reasons bed bugs appear include:
Bringing infested luggage into a home after travelling.
Purchasing second-hand furniture containing bed bugs or eggs.
Moving infested clothing, bedding or other belongings between properties.
Sharing accommodation or living in buildings where bed bugs can move between units.
Receiving infested items from another location.
Once introduced, bed bugs can hide in small spaces around beds and furniture, making them difficult to detect without a careful inspection.
When Do Bed Bugs Come Out?
Bed bugs are generally more active at night when people are resting. They respond to cues associated with potential hosts, including body heat and carbon dioxide.
However, bed bugs do not follow an absolute night-time schedule. They may feed during the day when suitable hosts are available or when their normal feeding opportunities are disrupted.
Their activity is not limited to a particular season. Bed bugs can survive indoors throughout the year, and their presence is not a reliable indicator of poor hygiene or a particular weather condition.
Where Do Bed Bugs Come From?
Bed bugs usually enter a property by travelling with infested belongings. They do not need to fly or jump from one person to another.
Common sources include:
Hotels and Guest Accommodation
Bed bugs can hide in mattress seams, bed frames, headboards and upholstered furniture. Travellers can unintentionally transport them in luggage and clothing.
Public Transport and Shared Spaces
Bags, coats and other belongings can carry bed bugs between locations. Finding a bed bug in a shared space is possible, although the presence of such a space alone does not establish where an infestation originated.
Second-Hand Furniture
Used beds, sofas, mattresses and other upholstered furniture should be inspected before being brought indoors.
Offices, Schools and Shared Accommodation
Bed bugs can be introduced through bags, clothing, furniture and other personal belongings. In multi-unit buildings, they may also move between adjoining areas through suitable gaps or structural openings.
Moving Between Homes
Moving furniture, bedding or other infested items can spread bed bugs to another property. Inspecting belongings and addressing known infestations before moving helps reduce this risk.
Are Bed Bugs Dangerous?
Bed bugs can cause discomfort, itching, disrupted sleep and considerable stress. However, they are not known to transmit diseases to people.
The main concerns associated with bed bug infestations include the following.
Itching and Skin Irritation
Bed bug bites can cause red, itchy bumps or swelling. Reactions differ considerably between individuals, and some people show no visible signs.
Allergic Reactions
Some individuals experience more pronounced local reactions. Severe allergic reactions are rare but can occur.
Secondary Skin Infections
Repeated scratching can damage the skin and increase the risk of a secondary infection.
Sleep Disturbance
Ongoing bites and the stress of dealing with an infestation can interfere with sleep and affect everyday comfort.
If you experience severe swelling, breathing difficulty or other signs of a serious allergic reaction, seek urgent medical attention. Bite marks alone cannot reliably confirm bed bugs, so look for physical evidence or arrange an inspection.
Can Bed Bugs Fly or Jump?
No. Bed bugs cannot fly or jump. They move by crawling and are capable of hiding in very small spaces.
They spread primarily by travelling on luggage, clothing, bedding, furniture and other belongings. Their flat bodies allow them to fit into narrow gaps that are difficult to inspect.
This is why finding the source of an infestation often requires examining items and locations beyond the bed itself.
Where Do Bed Bugs Hide?
Bed bugs usually stay close to places where people sleep or rest. During the day, they hide in dark, protected spaces and emerge when conditions favour feeding.
Common hiding places include:
Mattress Seams and Folds
Inspect seams, piping, labels, stitching and folds. These areas provide narrow spaces where bed bugs and their eggs may remain concealed.
Bed Frames and Headboards
Check joints, screw holes, cracks and gaps where wooden or metal components connect.
Sofas and Upholstered Furniture
Bed bugs may hide beneath cushions, in seams, around upholstery joints and underneath furniture.
Skirting and Furniture Joints
Small gaps along skirting, furniture joints and other sheltered edges can provide additional harbourages.
Curtains and Other Fabric Items
Inspect folds and seams where items are close to sleeping areas or where bed bugs have been introduced.
Luggage and Personal Belongings
Bags, folded clothing and travel items can transport bed bugs between properties.
Wall and Structural Gaps
Cracks, loose wallpaper and gaps around fixtures can provide hiding places. Severe or established infestations may extend beyond the immediate sleeping area.
What Do Bed Bug Bites Look Like?
Bed bug bites may appear as small, raised, reddish or discoloured bumps. They can itch and may occur on exposed areas such as the arms, shoulders, neck, legs and face.
Some people notice marks in clusters or lines, while others develop scattered marks. Some people do not react visibly at all.
Bite marks alone are not a reliable way to identify bed bugs. Mosquitoes, fleas and other causes can produce similar skin reactions, and the timing of a reaction can vary from person to person.
Look for physical evidence around the bed and nearby furniture alongside any skin symptoms.
What Do Bed Bug Eggs Look Like?
Bed bug eggs are tiny, approximately 1 millimetre long, and usually whitish or pearly in appearance. They may be attached to surfaces in concealed locations and can be difficult to distinguish from small particles without close inspection.
Common places to look include:
Mattress seams and folds.
Bed frame joints.
Cracks in furniture.
Upholstered furniture.
Narrow gaps around skirting.
Other protected surfaces near sleeping areas.
Female bed bugs can lay eggs over an extended period under suitable conditions. Once eggs hatch, young nymphs require blood meals as they develop through successive stages.
This is one reason a single treatment may not always resolve an infestation. The treatment strategy must account for concealed eggs, newly hatched nymphs and bed bugs that were missed during the initial application.
Which Bed Bug Spray Is Most Effective?
The most suitable bed bug insecticide depends on the infestation, the active ingredient, the treatment surface, the product formulation and any previous treatments.
Products available through Rafiki Pest Control for bed bug-control applications include:
Bedlam 200SL
Contains acetamiprid 200 g/L. It is a neonicotinoid insecticide that acts on receptors in the insect nervous system.
KunguNil 200SL
Contains imidacloprid 200 g/L, another neonicotinoid active ingredient with a different formulation and product profile from Bedlam 200SL.
Navigator 100SC
Contains alpha-cypermethrin 100 g/L, a synthetic pyrethroid that disrupts normal nerve signalling in insects.
Pali 50WP
A wettable-powder insecticide containing deltamethrin 50 g/kg, a synthetic pyrethroid.
Neocidal 600EW
Contains diazinon 600 g/L, an organophosphate insecticide with a different mode of action from the neonicotinoids and pyrethroids listed above.
Promax 20EC
Another product listed in the supplied bed bug-control range. Its active ingredient and concentration should be confirmed against the specific product packaging.
The best product should be selected according to its intended use and instructions rather than the brand name alone. Not every formulation is appropriate for every surface, and insecticide resistance can affect results. Application quality, coverage, preparation and the extent of the infestation also influence effectiveness.
Always use the product according to its label. Do not spray mattresses, bedding, clothing or other personal items unless the instructions specifically permit that application. Do not combine pesticides unless their instructions explicitly allow it.
What Is the Best Treatment for Bed Bugs?
Effective bed bug control requires more than spraying the insects you can see. A suitable treatment programme should consider their hiding places, movement between rooms and the possibility that eggs or concealed insects will remain after the initial visit.
Depending on the property, a professional treatment plan may include the following measures.
1. Inspection
Identify signs of bed bug activity and inspect sleeping areas, furniture, mattress seams, bed frames and other likely harbourages.
2. Preparation
Reduce clutter and follow the technician's instructions for handling bedding, clothing, luggage and other belongings.
3. Vacuuming
Vacuuming can help remove accessible bed bugs, shed skins and debris from suitable areas. It does not replace the treatment of concealed harbourages.
4. Steam or Controlled Heat
Steam can kill bed bugs directly where sufficient heat reaches them. Professional heat treatment requires appropriate temperature control and exposure conditions.
5. Targeted Insecticide Treatment
A suitable insecticide may be applied to the surfaces and harbourages permitted by the product instructions.
6. Residual Dusting
Where suitable, an insecticidal dust such as diatomaceous earth can be used in approved dry harbourages as part of an integrated treatment programme.
7. Monitoring and Follow-Up
Continue monitoring for signs of activity after treatment. Additional treatment may be required depending on the infestation and the findings during follow-up.
The effectiveness of pesticide treatment depends on infestation size, preparation, coverage, the life stages present and possible resistance. No single product guarantees eradication in every situation.
How to Prevent Bed Bugs From Returning
Preventing bed bugs mainly involves reducing the risk of introducing them and identifying activity early.
Inspect Used Furniture
Check second-hand mattresses, bed frames, sofas and upholstered furniture before bringing them into your home.
Check Luggage After Travelling
Inspect luggage seams, pockets and belongings after staying in accommodation where bed bugs may be present.
Reduce Clutter
Keeping areas around beds organised makes inspection easier and reduces the number of places where bed bugs can remain concealed.
Monitor Sleeping Areas
Periodically inspect mattress seams, bed frames and nearby furniture for live insects, shed skins, dark spots or eggs.
Handle Infested Items Carefully
Avoid moving potentially infested furniture or bedding into unaffected rooms. Follow appropriate cleaning, isolation and treatment advice to prevent spreading the infestation.
Seek Professional Help for Persistent Infestations
If bed bugs continue appearing after treatment, arrange a reassessment to identify missed harbourages, inadequate coverage or possible reinfestation.
Bed Bug Control Services by Rafiki Pest Control
Rafiki Pest Control LTD provides professional bed bug-control services for homes, apartments, hotels, hostels, offices and other properties in Kenya.
Our approach focuses on identifying the infestation, selecting appropriate treatment methods and providing guidance on preparation, monitoring and prevention.
We also supply selected bed bug-control products for customers who need suitable products for their own applications.
If you suspect bed bugs, look for physical evidence rather than relying on bites alone. Contact Rafiki Pest Control to discuss the problem and determine the appropriate next step.