The answer to 'what causes bed bug' is that bed bugs are small insects that feed on human blood. They can be brought into homes through various means, such as staying in infested hotels, buying used furniture or clothing, or even traveling on public transportation. Bed bugs are excellent hitchhikers and can easily hide in cracks, crevices, and seams of furniture, mattresses, and other household items.
Bed bugs are nocturnal and typically come out at night to feed on sleeping humans. Their bites can cause itchy red welts, and their presence can lead to sleepless nights and a general feeling of discomfort in the home. Bed bugs are resilient pests that can be challenging to eliminate, but with the right treatment and prevention methods, homeowners can get rid of them and prevent future infestations.