The answer to 'why is my bed bug nests' is that you likely have a bed bug infestation in your home. Bed bugs are small insects that feed on human blood and often hide in cracks, crevices, and seams of mattresses, bed frames, and other furniture. They lay their eggs in these hidden areas, creating 'nests' where they live and breed.
Some common signs of bed bug nests include small dark spots (their droppings), blood stains on your sheets, and the presence of live bed bugs. Bed bugs can be difficult to eliminate on your own, so it's best to call a professional pest control technician who can properly identify the problem and use the right treatment methods to get rid of the infestation.