The answer to 'bed bug nests' is that bed bugs do not build nests like other insects. Instead, they hide in cracks, crevices, and other small spaces near their food source - humans. Bed bug infestations are caused by the bugs hitchhiking into homes on luggage, clothing, or furniture, and then reproducing rapidly. Signs of a bed bug infestation include small blood spots on bedding, shed exoskeletons, and an offensive sweet odor.
Dealing with bed bugs requires a multi-pronged approach. For light infestations, homeowners can try DIY treatments like vacuuming, washing bedding, and using specialized bed bug sprays. However, for moderate to severe infestations, it's best to call in a professional pest control technician. They have access to more powerful insecticides and specialized equipment to fully eliminate the bed bug problem.