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These are the signs of bed bugs to look out for:

• Blood or rust-colored stains on mattresses, fabrics, or upholstery

• Dark spots of excrement that look like dots from a fine-tipped permanent marker

• Tiny eggshells and yellowish shed skins

You should not see live bed bugs after heat or fumigation treatments, but you may see dead bugs. For chemical treatments, it can take several days for bed bugs to die. However, you may see live bed bugs if they are hiding in areas to avoid insecticides or if they are resilient to the type of treatment used. 

Yes, it’s possible to have bed bugs and not find them because they hide in small spaces outside of mattresses, including baseboards, headboards, electrical outlets, clothing, and in crevices of walls. They can squeeze into spaces as small as the width of a credit card. Bed bugs can also live up to 400 days without feeding, making them resilient and hard to eradicate.

Yes, rats will go near a sleeping human, especially if there is food or crumbs nearby. What’s worse, they may even bite humans while they are asleep. Common places for bites are exposed fingers, toes, hands, and faces. To minimize the risk of rats approaching you and your family members while they’re asleep, do not eat or leave accessible food packages in the bedroom.