Bed Bugs exists in winter or summer?

Bed bugs exist year around. They are insects. They bite. They would freeze outside in the winter but they stay inside. Like all insects, they can be killed by insecticide. However, they burrow into bedding and mattresses where insecticide seldom penetrates. Mattresses can be covered with a plastic cover, but few people do. They also hide in the cracks between the wall and the floor. That space can be sealed with caulk. but few people do. They also hide in rugs. It is necessary to get insecticide in every crack and crevice where they hide and to wash sheets and bedding on a regular basis. They hide in any upholstered furniture. They are hard to get rid of.