Behaviour, Biology
& Habitat
Bed bugs are nocturnal, blood-feeding insects belonging to the family Cimicidae. Two species are common in Singapore: Cimex lectularius (common bed bug) and Cimex hemipterus (tropical bed bug). They are flat, oval-shaped, and reddish brown in colour, measuring approximately 4 to 5mm when unfed. Often mistaken for other small insects such as fleas and ticks or booklice.
They are expert hitchhikers, entering homes through luggage, used furniture, clothing, and bags. They do not travel through pipes or cracks from neighbouring units — their primary mode of spread is through human movement and second-hand items. Once established, colonies grow rapidly.
Bed bugs are drawn to warmth and carbon dioxide, making sleeping humans their preferred target. They typically feed for 5 to 10 minutes at night while the host sleeps, injecting an anaesthetic before drawing blood. Bites may not be felt immediately, and symptoms can appear hours later.
Getting a professional bed bug control service is your best bet to eliminate an infestation permanently and prevent re-infestation.
Bed Bug Characteristics
They are obligate blood-feeding parasites that have evolved to live in close proximity to their hosts. Understanding their biology helps identify and eliminate infestations faster.
The Lifecycle
(1st Instar)
Nymphs shed their skin five times before reaching the maturity stage. They require a meal before each shedding process. Depending on the condition, it takes about 21 days to a month for nymphs to develop into adults.
(2nd Instar to 4th Instar)
Baby bed bugs or young nymphs can grow up to about 0.5mm at each phase. Their growth reaches approximately 2mm to 4.5mm. Seeing them shed their skin and get significantly darker in colour is common.
Fully Developed Adult Bed Bug is the last stage of their life cycle. They will spend most of their time hiding, mating and — for females — laying eggs.
Bed Bug Life Stages
Signs of Bed Bug Infestation
Bed bugs are expert hiders, often going unnoticed until an infestation is well established. They are nocturnal and rarely seen during the day. Most people only discover they have a problem after waking up with unexplained bites or noticing stains on their bedding.
A single mated female introduced through a piece of luggage or used furniture can establish a new infestation within weeks. Colonies grow exponentially — what starts as a handful of bugs can become hundreds within two months.
Early detection is critical. Once signs are spotted, seek professional bed bug treatment immediately to prevent the infestation from spreading to other rooms.
Watch out for these signs:
Live Presence
Within the perimeter of the bed, seams and mattress box spring. They hide in cracks and corners on the bed frame and headboard. In hotel rooms you can find bed bugs in bed sheets, chairs and sofas, between cushion pillows and in the curtains. You can also find them in drawers, electrical outlets, and under wallpaper corners.
Marks
The rusty red stains on bedsheets are caused by bed bugs being crushed. These pests leave clear marks along the side of door frames and power sockets, especially near areas where they feed on blood. Additionally, tiny blood stains on bedsheets, upholstered furniture, pillowcases, and even pyjamas are signs of an infestation.
Faecal
Their droppings are dark coloured spots approximately 1mm in size and they may bleed on the fabric like a marker would. When cleaning and changing bedsheets, keep a look for these signs on the fabric. Their waste is typically dark reddish brown, rust or even black in colour.
Odour
Similar to other insects, bed bugs emit a musty-sweet odour called “alarm pheromones” when they are disturbed. While some people may compare this scent to berries, it can become unpleasant at higher concentrations. A strong musty smell in the bedroom is a clear warning sign.
Eggs
They typically lay eggs on rough surfaces, often within cracks and crevices. These eggs measure about 1mm in size and are easily visible with the naked eye. As the nymphs grow larger, they shed light yellow eggshells which can also be found near harbouring sites.
Types of Bed Bugs
Bed Bug Bites
When bed bugs bite, you may see a series of bites in a zigzag pattern, usually consisting of 3 to 5 small red bites. The most common areas to get bites are the neck, thighs, calves, arms and back.
These bites, similar to flea bites, can cause severe allergic reactions and skin infections. They will appear as itchy red bumps or just itchy bumps. You can apply anti-itch cream if you do not have an allergy reaction from the bite.
Baby bed bug bites tend to be in a straight line or small clusters, but this does not necessarily mean you have an infestation. Identifying the signs of bed bugs correctly is the most effective way to determine if you have a problem.
Frequently Asked Questions
What types of bed bugs are found in Singapore? ⌄
The two species most commonly found in Singapore are Cimex hemipterus (tropical bed bug) and Cimex lectularius (common bed bug). The tropical bed bug is more prevalent due to Singapore's warm, humid climate. Both species feed on human blood, leave similar bite marks, and require the same treatment approach.
Correct species identification is helpful but rarely changes the treatment strategy. Professional inspection is the most reliable way to confirm the species and assess the extent of the infestation.
How do bed bugs enter my home? ⌄
Bed bugs are almost exclusively introduced through human activity. The most common entry routes are infested luggage brought back from travel, second-hand furniture and mattresses, used clothing and bags, and guests or visitors whose belongings were previously exposed to bed bugs.
Unlike cockroaches or ants, bed bugs do not enter through drains, pipes, or natural pathways from outdoors. They spread passively by hitchhiking on personal items and can move between rooms in hotels and multi-unit buildings through shared walls and electrical conduits.
Are bed bugs dangerous to my health? ⌄
Bed bugs are not known to transmit diseases, but their bites cause intense itching, sleep disruption, and psychological distress. Repeated scratching of bite sites can lead to secondary skin infections. In rare cases, individuals develop severe allergic reactions requiring medical attention.
The psychological impact of a bed bug infestation — anxiety, insomnia, and social stigma — can be significant. Early treatment is strongly advised to prevent both physical and mental health consequences from prolonged exposure.
Can I get rid of bed bugs on my own? ⌄
DIY treatments such as over-the-counter sprays, bed bug traps, and heat guns are rarely effective against a full infestation. Bed bugs are adept at hiding in locations that are difficult to reach with surface sprays, and their eggs are resistant to most contact insecticides sold to consumers.
Without treating all harbouring sites simultaneously, surviving bugs and unhatched eggs will re-establish the infestation within weeks. Professional treatment using residual insecticides, steam, and targeted nest flushing is significantly more effective and provides lasting results.
How does Innovative Pest Management treat bed bugs? ⌄
Our NEA licensed technicians begin with a thorough inspection to locate all harbouring sites and assess the severity of the infestation. Treatment combines residual liquid insecticide applied to all known and suspected hiding spots, steam treatment for mattresses and soft furnishings, and targeted flushing agents to drive bugs from deep crevices.
A follow-up visit is scheduled to treat any newly hatched nymphs and assess the outcome of the initial treatment. All products used are NEA-approved and applied safely in accordance with label requirements.
Is the bed bug treatment safe for my family and pets? ⌄
Yes. All products used by Innovative Pest Management are NEA-approved and applied by licensed technicians trained in safe application methods. Residents and pets should vacate the treated rooms during application and for a short period afterwards as specified by the product label — typically 2 to 4 hours.
We advise laundering all bedding and clothing before re-entry and wiping down any exposed food preparation surfaces. Our technicians will provide a full post-treatment briefing before leaving the premises.
How long does bed bug treatment take and how long will results last? ⌄
A standard bed bug treatment visit for a typical HDB flat or condominium unit takes 1 to 2 hours depending on the size of the property and number of rooms affected. Larger properties or heavy infestations may require additional time or multiple visits.
Results from a professional treatment are typically evident within 1 to 2 weeks as the residual insecticide continues to work. A follow-up visit 2 to 3 weeks after the initial treatment is included to address any hatched nymphs that survived the first application.
How can I prevent bed bugs from coming back? ⌄
After treatment, encase your mattress and box spring in certified bed bug-proof covers and keep them on for at least one year. Inspect all luggage after travel and wash and dry clothing at high heat. Avoid purchasing second-hand mattresses, bed frames, or upholstered furniture.
Reduce clutter around the bed to eliminate harbouring sites, and regularly inspect mattress seams and headboard crevices. If you live in a multi-unit building, consider having neighbouring units inspected, as bed bugs can spread through shared walls and conduit pathways.
Get Professional Bed Bug Control
NEA Licensed & Guaranteed
Our NEA licensed technicians will inspect every harbourage site, eliminate the entire infestation with residual treatment and steam, and schedule a follow-up to ensure lasting results.