Bed bugs are small parasitic insects belonging to the order Hemiptera, often referred to as "true bugs" due to their specialised piercing and sucking mouthparts. While most insects in this group fee on plant sap, bed bugs are ectoparasites that feed exclusively on blood. The most common species affecting humans is Cimex lectularius (bed bug). Bed Bugs are nocturnal pests, meaning they are most active at night when people are asleep. They feed on human blood at all stages of their life cycle, and in larger infestations, this can lead to frequent biting, irritation and significant discomfort. Although bed bugs are not known to transmit serious diseases, their bites can cause itching, allergic reactions and disrupted sleep, making them a major nuisance pest. Historically, bed bugs were commonly associated with shared accommodation such as hotels, motels, hostels and dormitories. Today, they can be found in any environment, including residential homes, and are most often located in and around bedrooms; particularly in mattresses, bed frames and furniture. Bed bugs are found worldwide. While their presence declined for a period, there has been a noticeable resurgence since the early 2000s, largely due to increased travel and insecticide resistance.

Bed bugs are small, flat, oval-shaped insects that are visible to the naked eye. Adult bed bugs typically measure around 4-5 mm in length and are a rusty red-brown colour. They do not have wings and cannot fly, but they are fast-moving and excellent at hiding in tight cracks and crevices. Their bodies are usually flat when unfed, allowing them to hide in very narrow spaces. After feeding on blood, their bodies become swollen, elongated and darker in colour. Bed bugs have specialised piercing and sucking mouthparts (a proboscis), which are tucked underneath the head and thorax when not in use. When feeding, this mouthpart extends forward to pierce the skin and draw blood. Juvenile bed bugs (nymphs) look similar to adults but are smaller and lighter in colour, often appearing pale or translucent before feeding. Common Signs of Bed bugs Bed bugs are not always easy to spot, but there are several clear signs that may indicate an infestation. Bites on the skin are often one of the first indictors. These may appear as small, red, itchy marks, sometimes in lines or clusters, usually noticed after sleeping. Blood spots on bedding can occur when bed bugs are disturbed during feeding, leaving small stains on sheets, pillowcases or mattresses. Dark spotting is a common sign and appears as small black or dark brown marks on mattresses, bed frames, walls and furniture. These are bed bug droppings are often found near hiding areas. Shed skins and eggs may present in cracks and crevices. As bed bugs grow, they shed their outer skins, which can build up in infested areas. Eggs are small, pale and firmly attached to surfaces. Musty or sweet odour may be noticeable in heavier infestations, caused by bed bug secretions. Recognising these signs early can help prevent a small problem from becoming a larger infestation.

Life cycle Bed bugs develop through a process known as gradual metamorphosis, progressing from egg to nymph and then to adult. Adult female bed bugs require a blood meal before they can produce eggs. Once fed, they lay eggs in hidden locations such as cracks, crevices, mattress seams, bed frames and nearby furniture; typically close to where people sleep. Eggs are small, white and difficult to see with the naked eye. They are often laid in clusters and cemented firmly to surfaces, making them hard to remove without professional treatment. A single female can lay between 200-500 eggs during her lifetime, allowing infestations to grow rapidly. Eggs usually hatch within 7 to 30 days, depending on temperature and environmental conditions. After hatching , juvenile bed bugs (nymphs) must take a blood meal in order to grow and moult. Bed bugs pass through five nymph stages before becoming adults, requiring a blood feed between each stage. Under ideal conditions, the full life cycle can be completed in as little as 4-6 weeks. However, in cooler or less favourable environments, development may take several months or longer. Adult bed bugs can live for over a year and are highly resilient. They are capable of surviving for several months without feeding, which makes infestations difficult to eliminate without thorough and targeted treatment.

Habits Bed bugs are obligate blood feeders, meaning all life stages; male, female and nymphs; require blood to survive and develop. They are primarily nocturnal and spend most of the day hiding in cracks and crevices close to where people sleep. Common hiding places include mattresses, bed frames, headboards, bedside furniture, skirting boards and even behind wall fixtures such as power points and picture frames. At night, bed bugs become active and emerge to feed. They are attracted to body heat and carbon dioxide produced by sleeping humans, which helps them locate a host. After feeding, they return to their hiding spots, where they often gather in clusters. Bed bugs prefer to live as close as possible to their food source, which is why infestations are most commonly found in bedrooms. However, as populations grow, they can spread to other areas of the home including lounges, carpets and soft furnishings. Humans care their primary host, but in some situations, bed bugs may also feed on animals such as bats, cats or other mammals. Why Bed Bugs Spread Easily Bed bugs do not fly or jump, but they spread very effectively by hitchhiking on everyday items. They can easily attach themselves to luggage, clothing, bags and personal belongings, allowing them to move from one location to another without being noticed. Travel and accommodation are one of the most common ways bed bugs spread. Hotels, motels and other shared environments can unknowingly transfer bed bugs into luggage, which are then bought back into the home. Furniture and household items are another major source. Second-hand beds, mattresses, lounges and other upholstered items can carry hidden infestations if not carefully inspected. Movement within buildings also allows bed bugs to spread. they can crawl through wall cavities, along skirting boards, and between adjoining rooms, units and apartments, allowing infestations to grow beyond the original area. Because of their ability to spread quietly and quickly, early detection and prompt treatment are essential.

Bed bug infestations are often first noticed through bites and irrational experienced during sleep. While some people may not react to bites, many develop itchy red welts that can appear in lines or clusters due to repeated feeding. In some cases, the first visible signs are small blood spots on sheets or dark marks on mattresses and surrounding areas. Signs of Infestation Visible activity may include live bed bugs hiding in cracks and crevices around beds, furniture and walls. These areas provide ideal protection during the day when bed bugs are not active. Eggs and shed skins are often found in the same hiding places. Eggs are small and firmly attached to surfaces, while shed skins are left behind as bed bugs grow. Droppings and staining appear as small dark spots on bedding, mattresses, walls and furniture. These are a common and reliable sign of an active infestation. Odour in heavy infestations may become noticeable as a musty or slightly sweet smell caused by bed bug secretions. Bites and Health Effects When bed bugs bite, they inject saliva that allows them to feed without being noticed. Reactions vary from person to person. Some people experience no visible reaction, while others develop swelling, itching and irritation that can become quite severe. Ongoing bites can disrupt sleep and lead to stress and discomfort, especially infestations. How Infestations Start and Spread Bed bugs are commonly introduced into homes through luggage, clothing and personal belongings, particularly after travel. They can also be bought in through second-hand furniture such as beds, mattresses and lounges. It is important to understand bed bugs are not caused by poor hygiene. Even clean homes can become infested if bed bugs are introduced. Once inside, bed bugs can spread by crawling through wall cavities, along skirting boards, and into adjoining rooms or neighbouring properties. Why Bed Bugs Are Difficult to Control Bed bugs are highly effective at hiding and can live deep within cracks, crevices and furniture. Their eggs are resistant and difficult to remove and missing even a small area during treatment can allow the infestation to continue. They can also survive for several months without feeding, which allows them to persist even when a room is not in regular use. Impact on Homes and Businesses While bed bugs are not known to transmit serious diseases, they can have a significant impact on comfort and quality of life. Ongoing irritation, lack of sleep and the stress of dealing with an infestation can quickly become overwhelming. In homes, this leads to discomfort and frustration. In accomodation settings, it can also affect reputation and customer confidence if not addressed quickly and professionally.

Effective bed bug control requires a systematic and thorough approach. Because bed bugs hid in extremely small spaces and spread easily, professional inspection and treatment are essential for complete eradication. Inspection and Assessment The first and most important step is a detailed inspection to determine the extent of the infestation. This includes checking mattresses, bed frames, headboards, skirting boards, wall linings, furniture, curtains, power points, light fittings and any cracks or crevices throughout the room. Bed bugs can hid in very tight spaces, so every possible harbourage area must be carefully examined. Professional Treatment Methods Residual surface treatments are applied directly to cracks, crevices and know hiding areas. These treatments continue working over time, helping to eliminate bed bugs as they emerge. Targeted dust applications are used in areas where liquid treatments are not suitable, such as wall voids, electrical areas and appliances. These provide long-lasting control in hard-to-reach locations. Space treatments, when required, may be used as a supporting method. However, effective control relies primarily on treating all hiding places directly. Why Professional Treatment is Essential Bed bugs are difficult to eliminate without professional help because they hide deep within structures, their eggs are resistant, and even a small missed area can lead to reinfestation. They can also survive for long periods without feeding, making them persistent pests. It is also important to identify and manage any sources of reinfestation. Items such as luggage, clothing, furniture or even prams can reintroduce bed bugs if not properly treated.

While professional treatment is essential, there are also practical steps you can take to reduce the risk of infestation and support long-term control. Reducing Hiding Places Bed bugs are often introduced through everyday items. It is important to carefully inspect second-hand furniture before bringing it into your home, particularly beds, mattresses and upholstered items. After travel, checking luggage and clothing can help prevent an infestation from starting. Cleaning and Heat Treatments Regular vacuuming of mattresses, bed frames and surrounding areas can help reduce bed bug numbers. Steam treatments are highly effective, as they can kill both bed bugs and their eggs without leaving chemical residues. Washing and drying bedding and clothing on high heat is also recommend where possible. Preventing Reinfestation After treatment, care should be taken to avoid reintroducing bed bugs. Items should not be moved between rooms unless they have been checked or treated. Personal belongings, bags and other items returning to treated areas should also be inspected to ensure they are not carrying bed bugs.