This kind of bug is everywhere in the house. What is it, what are its habits and how to prevent it? There are many cracks on the wall and door frame, and there is a small head on the ground.

According to the photos you provided, these insects are moths. Moth is a common furniture beetle and likes to live in a humid environment. Their reproduction and activities are mainly on materials such as wood or paper, especially on building decoration materials, furniture, books and other items.

Moth control methods are as follows:

1. Keep indoors dry: moths like humid environment, so keeping indoors dry can reduce their reproduction. You can use a dehumidifier or open a window for ventilation on sunny days.

2. Use pesticides: moth pesticides can be used, such as fire water, insecticidal water and dichlorvos. Pay attention to safety when using, so as to avoid harm to human body and environment.

3. Clean up food residues and garbage: Food residues and garbage can also attract moths, so keep the kitchen and restaurant clean and clean up food residues and garbage in time.

4. Use insect repellent: You can use some insect repellents, such as moth balls and peppers, to prevent the invasion of moths.

5. Find the source: If the above methods are ineffective, it may be that the insect source comes from other parts of the room, such as cracks in the floor and walls. It is necessary to carefully check and take measures to plug the loopholes.

I hope the above information is helpful to you, and it is recommended to seek professional insecticidal company to handle it.