Bed bugs feed exclusively on blood, primarily human blood, and eat nothing else. They don’t touch food, crumbs, or garbage, which means cleanliness alone won’t starve them, and they can survive for months between meals.
Key Takeaways
- Blood only — bed bugs feed solely on blood, mainly from humans.
- Crumbs don’t matter — they ignore food and trash, so a spotless home won’t starve them.
- Months without a meal — bed bugs can survive long stretches between feedings.
- Quick night feeding — a full blood meal takes just a few minutes, usually while you sleep.
What do bed bugs eat?
Bed bugs are obligate blood feeders. Their entire diet is blood, and they prefer human hosts, though they will feed on other warm-blooded animals if people aren’t available. They have no interest in the things that attract other household pests; they don’t eat food scraps, sugar, garbage, or pet kibble. Everything they need comes from a blood meal.
This is why bed bug infestations have nothing to do with how clean or messy a home is. Clutter offers more hiding places, but the bugs are drawn to sleeping humans, not to dirt. As the EPA explains, bed bugs require blood to grow and reproduce, molting between stages after each meal. Our bed bug life cycle page covers how feeding ties into their development.
Can you starve bed bugs out?
Not easily, and not by cleaning. Because they don’t eat food, removing crumbs and taking out the trash does nothing to deprive them. And because they can survive remarkably long without a blood meal, simply leaving a room empty for a while rarely works. Depending on conditions, bed bugs can persist for many months between feedings, waiting for a host to return.
That endurance is part of what makes them so difficult. An apartment left vacant, or a guest room used only occasionally, can still harbor live bugs ready to feed when someone arrives. The CDC notes that bed bugs are resilient and that infestations require active control rather than waiting them out. The reliable path is targeted treatment, not starvation, as covered in how to get rid of bed bugs.
How and when do bed bugs feed?
Bed bugs are mostly nocturnal and feed while their host sleeps. Drawn by body heat and exhaled carbon dioxide, a bug emerges from its harborage, finds exposed skin, and pierces it to draw blood. A full meal usually takes only a few minutes, after which the bug retreats to digest and, eventually, molt or lay eggs.
Because feeding is brief and happens at night, most people never see it happen. The evidence shows up later as itchy welts, or as the bugs and dark fecal spots in mattress seams and other harborages. To catch feeding bugs on the move, interceptor traps placed under bed and furniture legs are effective, and how to check for bed bugs explains the signs to look for.
Frequently Asked Questions
Do bed bugs eat food or crumbs?
No. Bed bugs feed only on blood and completely ignore food, crumbs, and garbage. That’s why keeping a tidy kitchen, while good practice, has no effect on a bed bug infestation.
Can I get rid of bed bugs by keeping my house clean?
Cleaning alone won’t eliminate them, because they don’t feed on anything you can clean away. Reducing clutter removes hiding spots and makes inspection easier, but actual control requires treatment methods like heat, encasements, and targeted products.
How long can bed bugs live without feeding?
They can survive for many months between blood meals, depending on temperature and life stage. This endurance means you can’t simply wait them out by leaving a room unused. Active treatment is necessary.
How long does a bed bug take to feed?
A full blood meal usually takes only a few minutes. The bug feeds while you sleep, then retreats to its hiding place to digest. Because it’s quick and nocturnal, the feeding itself almost always goes unnoticed.