When renting a house outside, it is an important step to check the bottom of the bed, because the bottom of the bed is usually an indicator of the sanitary condition of the room. There may be dust, cockroaches, bugs and so on under the bed. By carefully observing the bottom of the bed, you can judge whether the room is cleaned frequently and whether there are sanitary problems. This is because the bottom of the bed is often ignored. If the bed is messy, it may indicate that the landlord does not pay enough attention to the cleaning and maintenance of the room. The bottom of the bed is also a place to hide bugs or other unclean things. Checking the bottom of the bed can help you avoid staying in an unsanitary room and protect your health and living environment. When checking the bottom of the bed, you can illuminate the bottom of the bed with a flashlight or mobile phone light, and carefully observe whether there is any abnormality. If there are obvious sanitary problems under the bed, it is suggested to consider choosing other rooms or looking for other rental options.