Somebody moves out, a guest room sits closed for the season, or a family heads out of town for a month, and the same thought comes up: if nobody's there to bite, won't the bed bugs just starve? It sounds reasonable. It's also how a lot of infestations survive. Bed bugs are built to wait, and in a heated, air-conditioned Southern house they can wait a long time.
In a normal, temperature-controlled home, bed bugs typically survive about 1 to 4 months without feeding, according to the University of Kentucky. In cool conditions (55°F or below) adults can last a year or longer, and the University of California reports lab survival of more than 400 days. Young nymphs give out first; older nymphs and adults hold on longest.
That's why leaving a home empty almost never starves out an infestation.
How Long Can Bed Bugs Go Without a Blood Meal?
The honest answer is a range, and the range is wide. The University of California's Statewide IPM Program puts it at 20 to 400 days, depending on temperature and humidity. Where a bug lands in that range depends mostly on two things: how warm it is and how old the bug is.
The best modern numbers come from Virginia Tech. In 2011, Andrea Polanco, Dini Miller and Carlyle Brewster starved four strains of the common bed bug (Cimex lectularius) at about 79°F, close to the inside of a typical Carolina or Virginia house, and tracked every life stage.
| Life stage | Mean survival without feeding (about 79°F) |
|---|---|
| First-stage nymphs (newly hatched) | About 14 to 36 days |
| Fifth-stage nymphs and adults | About 42 to 143 days |
Two details from that study are worth knowing. First, the youngest nymphs are the weak link, which matches the University of California's note that older nymphs survive longer without feeding than younger ones. Second, the insecticide-resistant strains died sooner than the susceptible ones. Resistance seems to cost them something. It just doesn't cost them enough to help you much.
Why Temperature Changes the Answer
Bed bugs are cold-blooded. When it's warm, they burn through their reserves faster, and when it's cool, they slow down and stretch a single meal much further.
- Heated or air-conditioned home: about 1 to 4 months is typical, per the University of Kentucky. Most houses in Charleston, Columbia, Raleigh and Virginia Beach sit in this range all year.
- Cool spaces, 55°F or below: potentially a year or longer, also per Kentucky. Think of an unheated garage, shed or storage room in a Greenville or Spartanburg winter.
- Lab conditions at low temperatures: adults have survived more than 400 days without food, the University of California reports.
The catch for homeowners: Moving an infested dresser or mattress into a cold garage for the winter doesn't starve the bugs faster. It may let them live longer. Cold only kills when it's far colder and held for days, which we cover in do bed bugs die in the cold.
Can You Starve Bed Bugs by Leaving the House Empty?
Not in any practical sense. The University of Kentucky says plainly that it's usually impractical to leave a home unoccupied hoping to starve an infestation. Four months away is a long trip, and in a cool house it might take a year.
Empty homes also cause a different problem. Kentucky notes that when an infested apartment sits vacant, bed bugs often spread to nearby units looking for a meal. In duplexes, townhomes and apartment buildings across Hampton Roads and the Triangle, that means a vacancy can turn one unit's problem into the whole building's.
Short-term rentals and second homes run into the same trap. A beach rental that sits empty between guests isn't starving its bed bugs. It's holding them for the next visitor.
And people aren't the only option. Bed bugs prefer us, but Kentucky notes they'll also bite dogs, cats, birds and rodents, and the University of California says they feed on other mammals and birds around the home. A house with a pet, or mice in the walls, is not truly empty of food.
How Long Should Infested Items Stay Bagged?
This is where the starvation question actually matters. Some things can't go through a hot dryer or be treated: books, papers, certain electronics, keepsakes. For those, the EPA says to seal them in a plastic bag and leave them there for up to a year to make sure any active bugs are dead.
- Bag it tightly. Use heavy plastic bags or sealed bins, and tape any gaps.
- Label it with the date. A year is easy to lose track of.
- Store it somewhere conditioned if you can. A warm closet shortens survival compared with a cold garage.
- Don't open it early to check. A bag opened at month three may still hold live adults.
Mattress and box spring encasements work on the same principle. The EPA says bed bugs trapped inside sealed covers die, and the University of California notes they eventually starve in there. Since adults can outlast a few months, leave the encasement on and zipped well past the point where you stop seeing bugs.
How Often Do Bed Bugs Feed When Someone Is Home?
With a host nearby, they don't wait anywhere near their limit. The University of California says adults may feed every 5 to 7 days. Each nymph must take at least one blood meal before it can molt to the next stage, and it goes through several of those molts before becoming an adult.
Females also have to feed regularly to keep laying eggs, according to Kentucky, and eggs hatch in about a week at room temperature. Under good conditions (70 to 80°F with a steady supply of blood), a bed bug can go from egg to adult in as little as a month. That's why the bites keep coming on a fairly steady rhythm once an infestation gets going, and why a home that's lived in grows a problem much faster than one that sits empty.
What This Means for Used Furniture and Moving
Because bed bugs can go months between meals, a couch or mattress that's been sitting on a curb or in storage isn't automatically safe. The University of Kentucky's advice is direct: avoid bringing discarded mattresses and sofas into the home, and if you're getting rid of infested pieces yourself, bag or wrap them in plastic so bugs don't shake loose on the way out.
The same logic applies to moving. Boxes packed from an infested home and stacked in a storage unit for a few months can still carry live bugs to the new place. Treat or bag belongings before the move, not after. If you travel often, our travel checklist for keeping bed bugs out of your luggage covers the inspection side.
When to Call a Professional
- You're still getting bites or finding bugs after weeks of doing everything right
- Bugs turned up again after a vacancy, a trip or a move
- You live in an apartment, duplex or townhome where a neighbor's unit may be involved
- You've found signs in more than one room, or on furniture away from the bed
Waiting them out works against you, so the faster route is treatment. Our bed bug control service starts with an inspection to find where they're hiding, and how long bed bug extermination takes walks through what the follow-up visits look like. You can request a quote online for homes across South Carolina, North Carolina and Virginia, including Charleston and Virginia Beach.
Key Takeaways
- Typical home, typical answer: about 1 to 4 months without feeding, per the University of Kentucky.
- Cold stretches it out: at 55°F or below, adults can survive a year or longer.
- Young nymphs die first. At about 79°F, newly hatched nymphs averaged 14 to 36 days; older nymphs and adults lasted far longer.
- Leaving home empty doesn't work, and in apartments it can push bugs into neighboring units.
- Bagged items need up to a year, according to the EPA, if you can't treat them another way.
Sources: A. M. Sutherland, D. H. Choe and V. R. Lewis, "Pest Notes: Bed Bugs" (Publication 7454), University of California Statewide IPM Program; M. F. Potter, "Bed Bugs" (ENTFACT-636), University of Kentucky Entomology; A. M. Polanco, D. M. Miller and C. C. Brewster, "Survivorship During Starvation for Cimex lectularius L.", Insects 2(2): 232-242 (2011), Virginia Tech; U.S. Environmental Protection Agency, "Do-it-yourself Bed Bug Control".
Frequently Asked Questions
In a normal heated or air-conditioned home, about 1 to 4 months, according to the University of Kentucky. In cool conditions of 55°F or below, adults can survive a year or longer. The University of California gives an overall range of 20 to 400 days depending on temperature and humidity.
Yes, but mainly when it's cool. The University of Kentucky says survival can reach a year or longer at 55°F or less, and the University of California reports adults surviving more than 400 days in the lab at low temperatures. In a warm home, a few months is more typical.
Not in a practical amount of time. The University of Kentucky says leaving a home unoccupied to starve bed bugs is usually impractical, and in vacant apartments the bugs often spread to neighboring units looking for a meal.
Newly hatched nymphs are the most vulnerable. In a Virginia Tech study at about 79°F, first-stage nymphs survived an average of about 14 to 36 days without a blood meal, depending on the strain. Older nymphs last much longer.
The EPA says items that can't be treated should be sealed in a plastic bag and left there for up to a year to make sure any active bugs are dead. Storing the bag somewhere warm rather than in a cold garage helps, since cool temperatures extend survival.
They prefer people, but the University of Kentucky notes bed bugs will also bite dogs, cats, birds and rodents. A home with pets or mice isn't truly empty of food for them.
When a host is available, adults may feed every 5 to 7 days, according to the University of California. Each nymph needs at least one blood meal before every molt, and females feed regularly to keep laying eggs.
Photo credits: Piotr Naskrecki for CDC / Harvard University, Public domain, via Wikimedia Commons; CDC / Harvard University, Dr. Gary Alpert; Dr. Harold Harlan; Richard Pollack, Public domain; NY State IPM Program at Cornell University, CC BY 2.0, via Wikimedia Commons.