Why does a bedbug appear? - briefly
Bedbugs appear when they are unintentionally transported in luggage, clothing, or used furniture and encounter warm environments with access to human blood. Their populations expand rapidly if detection is delayed and control measures are insufficient.
Why does a bedbug appear? - in detail
Bed bugs become noticeable when conditions favor their survival and reproduction. Warm temperatures between 20 °C and 30 °C accelerate development, allowing eggs to hatch within a week and nymphs to reach maturity in a month. High humidity, typically above 50 %, prevents desiccation of eggs and immature stages, further supporting population growth.
Human activity creates the primary food source. Bed bugs feed exclusively on blood, preferring exposed skin during periods of inactivity such as sleep. The presence of multiple hosts in close proximity, as found in hotels, dormitories, or densely populated households, increases feeding opportunities and facilitates rapid expansion of colonies.
Clutter provides shelter. Cracks in walls, seams in mattresses, and upholstered furniture offer protected sites for hiding, molting, and laying eggs. Accumulated belongings reduce the likelihood of detection, allowing infestations to persist unnoticed until population density reaches a visible threshold.
Movement of infested items spreads the insects. Luggage, second‑hand furniture, and clothing transferred between locations can transport eggs, nymphs, and adults. Lack of thorough inspection during transport or purchase enables introduction into new environments.
Control measures that disrupt any of these factors—temperature regulation, humidity reduction, elimination of clutter, and careful screening of belongings—directly limit the conditions that allow bed bugs to appear.