You have a problem with this question Worms are not pests out of thin air. It enters the house through handling (personal handling, cargo handling, logistics handling, etc.). ). Where are there more bugs? Generally, it is a place with dense houses, such as a rental house in a village in the city, with a large floating population and poor sanitary environment. Then it is carried by people or goods, which makes the insects more and more serious. For example, the dormitory in the factory is also a place where there are many bedbugs, because the dormitory space is small, there are many people and the hygiene is poor. As long as someone has been to a place with bedbugs or brought them into the dormitory through articles, bedbugs will be found on the beds in the whole dormitory. Bedbugs have to bite and suck blood to survive, so bedbugs usually appear on beds or sofas. People come out to bite when they are around, and hide when they get on the horse.

Your problem is too big. Are there bedbugs in this place? You can't ask from door to door. If it's a clean place, you haven't been to a place with bedbugs. Under normal circumstances, there will be no bedbugs.