Bed bugs can die on their own if they lose access to a blood meal long enough, but the timeline is slower than most people hope. At normal room temperature, starved bed bugs die within about 70 days on average. Under cooler conditions, they can survive far longer, with some laboratory specimens lasting over 400 days. So while starvation will eventually kill them, waiting them out is rarely a practical strategy for clearing an infestation.
How Long Bed Bugs Survive Without Feeding
Bed bugs are cold-blooded, which means their metabolism is directly tied to the temperature around them. At typical room temperature (around 73°F), most bed bugs at any life stage will die within 70 days without a host. Scientific American reports a similar range of two to three months at normal indoor temperatures.
Drop the temperature, though, and the math changes dramatically. In cooler environments, bed bugs enter a state of near-dormancy. Their metabolic rate can fall by more than 50% during prolonged starvation, allowing them to stretch their energy reserves much further. At around 50°F, metabolic activity slows to a crawl. Adults have survived over 400 days without feeding in laboratory settings at low temperatures. Even older nymphs outlast younger ones, since their larger body mass gives them more stored energy to burn through.
This ability to slow down and wait is a core survival trait. Bed bugs spend most of their lives hidden and motionless, tucked into crevices near where people sleep. They only emerge briefly to feed, then retreat. That lifestyle means their bodies are already built for long stretches of inactivity.
Why Vacating Your Home Won’t Work
The most common version of this question is really: “If I leave my home empty, will the bed bugs just die?” In theory, yes. In practice, the timeline makes it unreliable. You’d need to stay away for at least two to three months at a minimum, and that assumes room temperature stays warm enough to keep their metabolism running at a normal rate. If your home cools down during winter months or you lower the thermostat, those bugs could survive for the better part of a year.
There’s another complication. Bed bugs primarily feed on humans, but they can also feed on dogs and cats when people aren’t available. If a pet sitter stops by, or if rodents are present, bed bugs may find enough blood meals to keep going. Standard flea control products used on pets don’t work on bed bugs, so having treated pets in the home won’t help either.
Even in a truly empty home, bed bug eggs add another layer of difficulty. A single mated female can lay eggs that hatch weeks later, resetting the starvation clock for the next generation. The infestation doesn’t have to sustain itself continuously; it just needs occasional opportunities to feed and reproduce.
Temperature Extremes That Actually Kill Them
If you’re looking for ways bed bugs die without chemical treatment, temperature is the most effective natural weapon. Bed bugs exposed to 113°F die after 90 minutes of constant exposure. At 118°F, they die within 20 minutes. Eggs are tougher: they need 118°F sustained for a full 90 minutes to reach complete kill.
Professional heat treatments raise the temperature of an entire room to at least 130°F to 140°F and hold it there for two to three hours. This penetrates furniture, mattresses, and wall cavities where bugs hide. On a smaller scale, a household clothes dryer set on high will kill all life stages, including eggs, in about 30 minutes, as long as the dryer isn’t overstuffed.
Cold works too, but more slowly. Sustained temperatures at or below 32°F maintained for several days will kill bed bugs. A home freezer can work for small items like books or shoes, but freezing an entire living space to that temperature for days isn’t realistic for most people.
What “Dying on Their Own” Really Looks Like
Bed bugs don’t have natural predators in your home, they don’t catch diseases that wipe them out, and they don’t age out of an infestation quickly. A well-fed adult lives several months to nearly a year under normal conditions, and females lay one to five eggs per day during that time. A small population can grow into a large one before starvation has any meaningful effect.
The biological reality is that bed bugs are adapted to wait. Their metabolism drops when food is scarce. Unmated females and recently molted nymphs conserve energy automatically, burning fewer calories per gram of body weight than actively feeding bugs. They don’t forage or roam when hungry. They simply sit in their harborage spots and slow down, emerging only when they detect the carbon dioxide and body heat of a nearby host.
So while bed bugs absolutely can die on their own through starvation, counting on it means tolerating an infestation for months with no guarantee that every bug will starve before finding another meal. For isolated items like a piece of furniture or luggage, sealing them in plastic for several months at warm temperatures is a viable approach. For an entire home, active treatment with heat or targeted pesticides is far more reliable than waiting.