How Long Can Bed Bugs Live Without Feeding?
A very common hope when people discover bed bugs is that they can simply leave the room — or the house — empty for a while and starve them out. It is a reasonable idea, but the biology works against you. Here is how long bed bugs really survive without a blood meal, and why waiting is rarely a workable plan.
The short answer
Bed bugs can survive a surprisingly long time without feeding — typically several months, and in cool conditions up to a year or more. Adult bed bugs are far more resilient than most people expect, which is exactly why ‘just wait them out’ almost never succeeds.
Why they last so long
Bed bugs are cold-blooded and can dramatically slow their metabolism when food is scarce. The cooler the environment, the slower they burn energy and the longer they last. In a warm, occupied home they feed roughly weekly and breed quickly; in a cold, empty property they can enter a near-dormant state and simply wait.
| Conditions | Typical survival without feeding |
|---|---|
| Warm, occupied home (around 20°C) | 2–5 months |
| Cool, unoccupied property | Up to a year or more |
| Newly hatched nymphs | Weeks (they need to feed sooner than adults) |
Why leaving a room empty does not work
There are several problems with the starve-them-out approach:
- They wait longer than you can. Few people can leave a bedroom or home unused for a year.
- They move to find food. Cut off from a host in one room, bed bugs will travel — along skirting, through wall voids, into adjoining rooms or neighbouring flats — rather than sit and die.
- Eggs keep hatching. Even if some adults die, eggs continue to hatch, restarting the cycle.
In practice, trying to starve bed bugs out usually just gives them time to spread further through the property, turning a one-room problem into a whole-house one.
What actually clears them
Rather than waiting months and hoping, the reliable route is to kill them directly. Heat treatment raises the whole property above 56°C and kills every bed bug and egg in a single visit — no waiting, no spread, and a written 60-day guarantee. If the problem is genuinely new and light, a £175 spray visit may resolve it. Either way, direct treatment beats waiting every time.
Frequently asked questions
Can I starve bed bugs out by leaving a room empty?
Realistically no. Adult bed bugs can survive several months without feeding, and up to a year or more in cool conditions. Cut off from a host, they travel to find food rather than sit and die, so leaving a room empty usually just spreads the problem further.
How long can bed bugs live without a host?
In a warm occupied home, adults typically survive 2–5 months without feeding; in a cool, unoccupied property they can last a year or more by slowing their metabolism. Newly hatched nymphs need to feed sooner, within weeks.
Will bed bugs die if I stop sleeping in the bed?
No — they will simply move to wherever you are sleeping, or travel through the property to find another host. Changing rooms tends to spread bed bugs rather than remove them. Direct treatment is the only reliable solution.